The Role of Health Professionals in Tobacco Cessation - Joint position statement
This statement was developed cooperatively by the Canadian Association of Occupational Therapists, Canadian Counselling and Psychotherapy Association, Canadain Dental Hygienists Association, Canadian Medical Association, Canadian Nurses Association, and Canadian Physiotherapy Association.
There is a role for every Canadian health professional in tobacco-use cessation.1 Tobacco use2 inflicts a heavy burden on Canadians' health and on the Canadian health-care system, and health professionals can advocate effectively for tobacco-use cessation at the clinical and public health levels.
As providers of client and patient-centered services, health professionals are involved in tobacco cessation by:
* assessing and documenting all forms of tobacco use, willingness to quit and risk of exposure to second-hand smoke;
* discussing with clients and patients the negative health effects of tobacco use and exposure to second-hand smoke, and the health and other benefits (e.g., financial) of becoming tobacco free;
* offering to help, and helping, tobacco users to quit;
* offering a variety of tobacco-cessation strategies (e.g., counselling, behavioural therapy, self-help materials, pharmacotherapy) as appropriate to their knowledge, skills and tools;
* providing strategies for non-smokers to help them reduce their exposure to second-hand smoke;
* being knowledgeable about and providing referrals to community-based initiatives and resources;
* recognizing that relapse occurs frequently, and conducting follow-up assessment and intervention;
* tailoring interventions to the needs of specific populations (e.g., age, gender, ethnicity, diagnosis, socio-economic status); and
* using a collaborative, multidisciplinary approach.
As educators and researchers, health professionals are involved in tobacco cessation by:
* including education on tobacco-cessation strategies and strategies for resisting tobacco use in basic education programs for health professionals;
* providing professional development programs for health professionals on tobacco cessation;
* conducting research to encourage and improve health professionals' knowledge and provision of tobacco cessation; and
* communicating research evidence about tobacco-cessation strategies.
As administrators of health-care organizations, health professionals are involved in tobacco cessation by:
* offering training on tobacco cessation as part of employee orientation;
* providing access to professional education on tobacco cessation for employees;
* enforcing applicable bans on tobacco wherever health professionals are employed (e.g., health-care facilities, private homes); and
* ensuring that tobacco-cessation programs and tobacco-free workplaces are included in accreditation standards.
As public health advocates, health professionals are involved in tobacco cessation by:
* increasing public awareness that health professionals can help people remain tobacco free or stop using tobacco; and
* advocating for federal, provincial and territorial governments' investment in comprehensive tobacco control that includes programs, legislation and policies to prevent the uptake of tobacco and reduce tobacco use (e.g., bans on tobacco advertising). Programs must focus on health promotion and include community-based initiatives.
Tobacco is an addictive and harmful product, and its use is the leading cause of preventable death in Canada.3 Each year in Canada, more than 37,000 people die prematurely due to tobacco use.4 Approximately 17 per cent of the population 15 years of age and older (about 4.8 million Canadians) smoke.5 Strong evidence has revealed that smoking is associated with more than two dozen diseases and conditions.6 The economic costs of tobacco use are estimated at $17 billion annually ($4.4 billion in direct health-care costs and $12.5 billion in indirect costs such as lost productivity).7
Second-hand smoke is also harmful. Each year, more than 1,000 non-smoking Canadians die due to second-hand smoke.8 Exposure to second-hand smoke is the number two cause of lung cancer (smoking is the number one cause).9 Second-hand smoke can also aggravate allergies, bring about asthma attacks and increase the risk of bronchitis and pneumonia.10 Research also suggests that there may be a link between second-hand smoke and the risk of breast cancer.11
Tobacco use is the result of the complex interaction of individual and social factors, such as socio-economic status, having family members who smoke and exposure to marketing tactics of the tobacco industry. Reduction and elimination of tobacco use requires comprehensive, multi-faceted strategies addressing both physical dependence and social context. Such strategies will include:
* prevention - helping to keep non-users from starting to use tobacco;
* cessation - helping current smokers to quit, and helping prevent relapse; and
* protection - protecting all Canadians from the harmful effects of tobacco use and from the influences of tobacco industry marketing.
Prevention is the most important strategy of the three; being tobacco-free is a vital element of a healthy active life. Thus, for current tobacco users, quitting is the single most effective action they can take to enhance the quality and length of their lives.
Most tobacco users would like to improve their health, and in a Canadian survey 30 per cent of all smokers stated that they intended to quit as means of doing so.12 Indeed, in studies in Canada, the U.K. and Germany, smokers rated health concerns and current health problems as the primary reason for wanting to quit;13 other reasons why smokers quit include the cost of cigarettes14 and persistent advice to quit from family15 and health professionals.16 However, the relapse rate is very high because of the addictive nature of tobacco.17 Most smokers attempt to quit several times before they finally succeed.
Smoking cessation counselling is widely recognized as an effective clinical strategy. Even a brief intervention by a health professional significantly increases the cessation rate.18 Furthermore, counselling programs that initiate follow-up calls to smokers as a "proactive" measure have been found to increase smoking-cessation rates by 50 per cent.19 The majority of Canadians consult a health professional at least once a year,20 creating several "teachable moments" when they may be more motivated than usual to change unhealthy behaviours.21 A smoker's likelihood of quitting increases when he or she hears the message from a number of health-care providers from a variety of disciplines.22
However, health professionals encounter barriers that require solutions, notably:
- the need for better education for health professionals (e.g., how to identify smokers quickly and easily, which treatments are most effective, how such treatments can be delivered);
- the need to allow for sufficient time to provide counselling;
- the need to focus on preventive care by
* increasing funding for preventive care (e.g., providing reimbursement for smoking cessation interventions, follow-up or support); and
* encouraging health-care settings to facilitate preventive care (e.g., access to quick reference guides or tools to identify people with specific risk factors);
- the need to increase public awareness of the smoking cessation services a health professional can provide; and
- the need to recognize the frustration associated with the high rate of relapse. Because of the powerful nature of tobacco dependence, smokers often go through a long period of reaching readiness before they finally quit.
Bao Y., Duan N., & Fox S. A. (2006). Is some provider advice on smoking cessation better than no advice? An instrument variable analysis of the 2001 National Health Interview Survey. Health Services Research, 41(6), 2114-2135
Breitling, L. P., Rothenbacher, D., Stegmaier, C., Raum, E., & Brenner, H. (2009). Older smokers' motivation and attempts to quit smoking. Deutsches Arzteblatt International, 106(27), 451-455.
Canadian Action Network for the Advancement, Dissemination and Adoption of Practice-informed Tobacco Treatment. (2008). Dynamic guidelines for tobacco control in Canada Version 1.0 [Wiki clinical practice guidelines]. Toronto: Author.
Canadian Cancer Society. (2010). Second-hand smoke is dangerous. Toronto: Author. Retrieved May 19, 2010, from http://www.cancer.ca/canada-wide/prevention/quit%20smoking/second-hand%20smoke.aspx
Canadian Centre on Substance Abuse, (2006). The costs of substance abuse in Canada in 2002. Ottawa: Author.
Canadian Lung Association. (2006). Smoking and tobacco: Second-hand smoke. Retrieved June 14, 2010, from http://www.lung.ca/protect-protegez/tobacco-tabagisme/second-secondaire/hurts-nuit_e.php
Canadian Dental Hygienists Association. (2004). Tobacco use cessation services and the role of the dental hygienist - a CDHA position paper. Canadian Journal of Dental Hygiene, 38(6), 260-279.
Canadian Medical Association. (2008). Tobacco control [Policy statement]. Ottawa: Author.
Fiore, M. C., Jaen, C. R., Baker, T. B., Bailey, W. C., Benowitz, N. L., & Curry, S. J. (2008). Treating tobacco use and dependence: 2008 update [Clinical practice guideline]. Rockville, MD: U.S. Department of Health and Human Services, Public Health Service.
Health Canada. (2009). Smoking and your body: Health effects of smoking. Ottawa: Author. Retrieved June 17, 2010, from http://www.hc-sc.gc.ca/hc-ps/tobac-tabac/body-corps/index-eng.php
Health Canada. (2007). Overview of health risks of smoking. Ottawa: Author. Retrieved June 17, 2010, from http://www.hc-sc.gc.ca/hc-ps/tobac-tabac/res/news-nouvelles/risks-risques-eng.php
Nabalamba, A, & Millar, W. J. (2007). Going to the doctor [Statistics Canada, catalogue 82-003]. Health Reports, 18(1), 23-35. Retrieved January 26, 2011, from http://www.statcan.gc.ca/pub/82-003-x/2006002/article/doctor-medecin/9569-eng.pdf
Physicians for a Smoke-Free Canada. (2005). Smoking in Canada: A statistical snapshot of Canadian smokers. Ottawa: Author. Retrieved May 14, 2010, from http://www.smoke-free.ca/pdf_1/SmokinginCanada-2005.pdf
Registered Nurses' Association of Ontario. (2007). Integrating smoking cessation into daily nursing practice [Nursing best practice guideline]. Toronto: Author.
Ross, H., Blecher, E., Yan, L., & Hyland, A. (2010) Do cigarette prices motivate smokers to quit? New evidence from the ITC survey. Addiction, November 2010.
Shields, M. (2004). A step forward, a step back: Smoking cessation and relapse. National Population Health Survey, Vol. 1, No. 1. Ottawa: Statistics Canada.
Statistics Canada. (2009). Canadian tobacco use monitoring survey (CTUMS): CTUMS 2009 wave 1 survey results. Ottawa: Author. Retrieved January 25, 2011, from http://www.hc-sc.gc.ca/hc-ps/tobac-tabac/research-recherche/stat/_ctums-esutc_2009/w-p-1_sum-som-eng.php
Stead, L. F., Lancaster, T., & Perera, R. (2006). Telephone counselling for smoking cessation (review). Cochrane Database of Systematic Reviews, Issue 3.
Vangeli, E., & West, R. (2008). Sociodemographic differences in triggers to quit smoking: findings from a national survey. Tobacco Control, 17(6), 410-415.
Young, R.P., Hopkins, R.J., Smith, M., & Hogarth, D.K. (2010). Smoking cessation: The potential role of risk assessment tools as motivational triggers. Post Graduate Medical Journal, 86(1011), 26-33.
Tobacco: The role of health professionals in smoking cessation [Joint position statement]. (2001)
1 For detailed recommendations and guidelines for tobacco treatment related to health professionals, see Canadian Action Network for the Advancement, Dissemination and Adoption of Practice-informed Tobacco Treatment, (2008); Registered Nurses' Association of Ontario, (2007); and Canadian Dental Hygienists Association, (2004).
2 For the purpose of this position statement, tobacco includes products that can be inhaled, sniffed, sucked or chewed (e.g., flavoured cigarillos, kreteks, chewing tobacco, moist snuff, betel or qat, hookah or shisha, bidis, cigars and pipes).
3 (Health Canada, 2009)
4 (Health Canada, 2007)
5 (Statistics Canada, 2009)
6 (Health Canada, 2007)
7 (Canadian Centre on Substance Abuse, 2006)
8 (Canadian Cancer Society, 2010)
9 (Canadian Lung Association, 2006)
10 (Canadian Cancer Society, 2010)
11 (Canadian Cancer Society, 2010)
12 (Physicians for a Smoke-Free Canada, 2005)
13 (Vangeli & West, 2008; Ontario Tobacco Research Unit - Tobacco Informatics Monitoring System (TIMS), 2008; Breitling, Rothenbacher, Stegmaier, Raum & Brenner, 2009)
14 (Ross, Blecher, Yan & Hyland, 2010)
15 (Young, Hopkins, Smith & Hogarth, 2010)
16 (Bao, Duan & Fox, 2006)
17 (Fiore et al., 2008; Shields, 2004)
18 (Fiore et al., 2008)
19 (Stead, Lancaster & Perera, 2006)
20 (Nabalamba & Millar, 2007)
21 (Canadian Medical Association, 2008)
22 (Fiore et al., 2008)
Industrialization and manufacturing have had enormous positive benefits for humankind, but the consequences of hazardous by-products (chemical contamination) to human health and the environment are less well recognized. A major incident such as Bhopal is an unequivocal example of catastrophic poisoning caused by industry. However, more subtle human health impacts can result from low levels of exposure to chemical and industrial by-products from agriculture, consumer products, manufacturing, and even medical sources. Chemicals from industrial sources have been found in the soil, water, air, food and human tissue. Due to improving technology, even minuscule amounts of potentially noxious substances can be detected.
Some exposures warrant remedial action, but in others the health impact may be negligible: the toxin, dose, route and duration of exposure must be considered. Of course, there are potentially toxic substances that have been found to pose little or no harm to human health, but there are many more for which the health effects are unknown. A substantial knowledge gap exists in that the effects of many chemical agents have not been fully studied. As a result, rigorous surveillance and assessment to ensure potential health impacts are reduced or avoided is necessary. Chemicals like dichlorodiphenyltrichloroethane (DDT) can persist in the environment or in living beings long after the product was pulled from the market, making it essential that full and rigorous testing of new and existing chemicals is undertaken. Finally, research is needed to determine whether emerging issues, such as the presence of pharmaceuticals in drinking water, pose a legitimate threat to human health.
Chemicals, properly managed, can and will continue to provide enormous benefits to society, but caution is warranted because of the potential health consequences. Provided below is a discussion of certain classes of chemicals that need to be regulated, monitored and properly researched.
Agriculture represents the largest component of the global economy. Rising pressures to meet the needs of a growing population have resulted in the mechanization of farming, and the widespread use of fertilizers and pesticides.1 Fertilizer and pesticide run-off has been found in soil, water and the human food supply.2 Approximately 40 chemicals classified by the International Agency for Research on Cancer (IARC) as known, probable, or possible human carcinogens, are EPA registered pesticides available on the open market.3 Long-term low dose pesticide exposure has been linked to various cancers, immune suppression, hormonal disruption, reproductive abnormalities, birth defects, and developmental and behavioural problems.4 Certain pesticides are also known to be persistent in the human body.5 While many individual pesticides can be safely used, there is a lack of research on the effect of certain pesticides when used in combination.
Modern technologies have led to advances with a positive impact on the quality of human life. While newer consumer products have benefits over earlier materials, their use is not without side effects. Both the chemicals used to make these products and those that form key components of the products themselves may be harmful. Bisphenol A (BPA) is an industrial chemical added to many hard plastic bottles and to metal based food and beverage cans since the 1960s.6 In August 2010, Statistics Canada reported that measurable levels of BPA were found in the urine of 91 per cent of Canadians aged six to 79.7 Concerns have been raised about effects on the brain, behaviour, and prostate gland from exposure to this chemical, particularly in fetuses, infants, and children.8 In 2008, Canada banned BPA in infant bottles.9 In October 2010, Canada went a step further by becoming the first jurisdiction in the world to declare BPA toxic.10
With the growing demand for consumer products, there has been a corresponding growth in manufacturing. Manufacturing is one of the biggest contributors to outdoor air pollution, and contributes to soil and water pollution.11 In 2004, US industry released 1.8 billion pounds of potentially toxic chemicals. Exposure to some of these chemicals has been linked to severe health effects, including cancer. 12 One of the released chemicals, dioxin, can be harmful at very low levels. Dioxins accumulate in fats and break down slowly. This leads to contamination of the food supply, and human exposure through the consumption of meat, dairy, fish and shellfish.13 Even in the far north, animals have been found to contain dioxins.14 The EPA estimates that the cancer risk from dioxins already present in the general public is 1-per-1,000.15 In most cases the emissions pose minimal risk to human health. However, chemicals, and chemical combinations which remain unstudied should be properly assessed.16
Advancements in medical science and the use of pharmaceuticals, diagnostic equipment and other medical treatments have prolonged life expectancy. However, these interventions can also contribute to environmental contamination. In 2008, the Associated Press reported pharmaceuticals in the water of 24 major metropolitan areas in the United States, serving 41 million people.17 There is a concern that these pharmaceuticals could negatively impact male fertility, lead to birth defects, cause breast and testicular cancer in humans, and lead to antibiotic resistance.18 For many pharmaceuticals found in water sources, no concerted environmental impact surveys have been carried out.19
Mercury is used in fever thermometers, sphygmomanometers, gastrointestinal tubes, and oesophageal dilators20. Reports indicate that medical waste incinerators are among the largest sources of anthropogenic mercury emissions in both the United States and Canada.21 Medical waste, while not the principle source of mercury poisoning, contributes to the mercury levels present in the environment. In fetuses, infants and children, low-dose exposure to mercury can cause severe and lifelong behavioural and cognitive problems.22 At higher exposure levels, mercury may adversely affect the kidneys, the immune, neurological, respiratory, cardiovascular, gastrointestinal, and haematological systems of adults.23 It has also been linked to cancer.24
These examples highlight the major categories of human exposure to chemicals. As the review suggests, some of these chemicals have been linked to harmful human health impacts. What is important to keep in mind, however, is that the harm is conditional on the level and lengths of exposure. For most people, these chemicals pose no harm because the exposure is so low. In some cases, such as BPA, it has been determined that the potential harm is not worth the risk: the Canadian government has decided to declare BPA toxic and regulate it accordingly. In other cases, such as pharmaceuticals, the evidence simply warrants further study and surveillance. Given the potential harm to human health, surveillance and research are vitally important in all categories. The more information that is available to policy makers and health care professionals, the better the chance of limiting human health impacts.
What has been done?
Concerns regarding chemical contamination and human health have led to numerous interventions from the international community. These include the International Programme on Chemical Safety (1980), the Inter-Organization Programme for the Sound Management of Chemicals (1995), the Globally Harmonized System of Classification and Labelling (2002), and the Strategic Approach to International Chemicals Management, which was adopted by governments and stakeholders at the first International Conference on Chemicals held in Dubai in 2006. 25
Various conventions have also been passed, including the Stockholm Convention (2004) on persistent organic pollutants such as DDT, and the Rotterdam Convention (2004) which applies to pesticides and industrial chemicals.26 There is some concern about the continued effectiveness of the Rotterdam convention. In 2006, the Canadian government was instrumental in preventing the listing of asbestos as a toxic chemical. Given the persuasive evidence of the harm caused by asbestos, this action undermines the legitimacy of voluntary international conventions.27
In addition to being a signatory to all international agreements listed above, the Canadian government has programs for chemical management domestically. The main tool is the Canadian Environmental Protection Act (CEPA) 1999. Jointly administered by Environment Canada and Health Canada, it is intended to prevent pollution and address the potentially dangerous chemical substances to which Canadians are exposed.28 The plan calls for increased surveillance of certain chemicals to monitor exposure and health effects, and will increase focus on the management of the health and environmental risks of pharmaceuticals, personal care products, and chemical contamination in food.29
There were 23,000 chemical substances on the Domestic Substances List (DSL) in Canada in 1999. To date, only about 1,000 of these chemicals have been fully assessed. Of the remaining 22,000, 85% have been categorized as not requiring any additional action.30The most recent Canadian Chemicals Management Plan states that full assessments will be done on 550 substances identified as potentially harmful. Even with these additional assessments, more than 3,000 chemicals will not have been assessed.
Canadian Medical Association
In 2009, the Canadian Medical Association and the Canadian Nurses Association released a joint position statement on environmentally responsible activity for the health-care sector. Recommendations included the proper handling and disposal of toxic chemicals and the reduction of products using these substances. An adapted version of this position statement was then endorsed by a coalition of 12 national healthcare organizations and the David Suzuki Foundation.
In October 2010, the World Medical Association, of which CMA is a member, adopted a policy statement on environmental degradation and the management of chemicals. The statement calls for mercury-free health care, support for international efforts to restrict chemical pollution and to monitor harmful chemicals in humans and the environment, and mitigation of the health effects of toxic exposure to chemicals.
What needs to be done?
Research and Surveillance
Research on chemicals produced through man-made activities remains insufficient. While some of the more toxic chemicals have been reviewed and are now more closely regulated, thousands remain that have had neither health nor environmental assessments. The Domestic Substances List in Canada has 3,300 chemicals of concern that have not been assessed. There is limited research on the effect of these chemicals in combination or in different mediums. Finally, work must be done to ensure environmental and human surveillance of potential chemical exposure threats.
1. Urges the government to complete the health and environmental assessment of the chemicals on the Domestic Substances List.
2. Encourages research on the health impacts of chemical substances, as well as the combinations of these substances in different products (e.g. pesticides), and in different mediums (e.g. pharmaceuticals in drinking water). Long-term research programs are required to determine health impacts from prolonged low-dose exposures.
3. Encourages ongoing surveillance of chemicals in the environment.
4. Encourages ongoing research on the impact of regulations and monitoring of chemicals on human health and the environment.
Regulations have been developed both internationally and domestically to undertake chemical management. However, gaps remain, largely due to the voluntary nature of the frameworks. Canada can play a lead role by respecting its commitments, seeking continued adherence to these agreements and providing leadership in developing effective domestic programs and legislation.
5. Urges the government to continue to support international efforts to manage chemical pollution. In particular CMA urges the government to fully support the principles of the Rotterdam Convention and support the listing of Asbestos as an Annex III toxic chemical.
6. Supports government legislation and regulation which reduces dangerous chemical pollution, detects and monitors harmful chemicals in both humans and the environment, mitigates the health effects of toxic exposures, and requires an environmental and health impact assessment prior to the introduction of a new chemical. Regulatory frameworks should be favoured over voluntary frameworks in order to ensure a level playing field for all manufacturers and to secure rapid and equitable health protection for all Canadians. CMA encourages the government to advocate for similar legislation internationally.
Physicians can participate in the monitoring of patients for potential health effects from chemical exposure. Additionally, physicians can be leaders in encouraging greener health care practices. Finally, physicians can support national medical organizations in developing clinical tools to assess patient risk to chemical exposure.
7. Supports the phase out of mercury and other persistent, bio-accumulating and toxic chemicals in health care devices and products.
8. Supports the development of effective and safe systems to collect and dispose of pharmaceuticals that are not consumed.
9. Supports the development of clinical tools for physicians to help assess their patients' risk from chemical exposures.
Education and Professional Development
Physicians have a role to play in educating their patients, the public, and current and future colleagues about the potential human health consequences of chemical contamination. Medical education and continuing professional development in this area could have a significant impact on human health.
10. Should assist in building professional and public awareness of the impact of the environment and global chemical pollutants on personal health.
11. Supports the development of locally appropriate continuing medical education on the clinical signs, diagnosis and treatment of diseases that are introduced into communities as a result of chemical pollution.
12. Encourages physicians to inform patients about the importance of safe disposal of pharmaceuticals that are not consumed.
National and International initiatives have substantially reduced the incidence of harmful chemical contamination, but more work is needed. Evidence of health effects (or lack thereof) may be strong for certain chemicals, but for others it remains incomplete. Given the dangers of chemicals such as dioxin, which can cause severe effects with small doses, more comprehensive research is warranted. To ensure human health consequences are identified and risks are minimized, improved surveillance is essential.
Further policies and regulations are needed to ensure that chemicals utilized are as safe as possible. The Canadian BPA ban demonstrates the use of the precautionary principle in the presence of convincing if not complete evidence. While there are clear benefits associated with the use of chemicals, it is necessary to ensure that potential harmful effects are considered.'
Finally, public and health care provider information is sorely lacking. Physicians can play a role in correcting some of these deficiencies through their actions to support research and surveillance, advocacy, leadership, education, and professional development.
1 Ongley, Edwin D. (1996) Control of water pollution from agriculture- FAO irrigation and drainage paper 55.Chapter 1: Introduction to agricultural water pollution Food and Agriculture Organization of the United Nations. Available at: http://www.fao.org/docrep/w2598e/w2598e00.HTM
2 Peters, Ruud J.B. (2006) Man-Made Chemicals in Food Products. TNO Built Environment and Geosciences. Available at: http://assets.panda.org/downloads/tno_report.pdf
3 Reuben, Suzanne H. (2010) Reducing Environmental Cancer Risk: What We Can Do Now: 2008-2009 Annual Report. President's Cancer Panel. Available at: http://deainfo.nci.nih.gov/advisory/pcp/annualReports/pcp08-09rpt/PCP_Report_08-09_508.pdf
4 Reuben, Suzanne H. (2010) Reducing Environmental Cancer Risk...; Shah, Binod P. & Bhupendra Devkota (2009) "Obsolete Pesticides: Their Environmental and Human Health Hazards." The Journal of Agriculture and Environment. Vol:10 June 2009. Available at: http://www.nepjol.info/index.php/AEJ/article/view/2130/1961 ; Kjellstrom, Tord et.al. (2006) Chapter 43: Air and Water Pollution: Burden and Strategies for Control in Disease Control Priorities in Developing Countries. Disease Control Priorities Project. Available at: http://files.dcp2.org/pdf/DCP/DCP43.pdf
5 California Environmental Protection Agency (2002) Environmental Protection Indicators for California: Chapter 3: Environmental Exposure Impacts Upon Human Health. Available at: http://oehha.ca.gov/multimedia/epic/2002reptpdf/Chapter3-7of8-HumanHealth.pdf
6 United States Food and Drug Administration (2010) Update on Bisphenol A for Use in Food Contact Applications. Available at: http://www.fda.gov/newsevents/publichealthfocus/ucm064437.htm
7 CBC News (October 13, 2010) BPA declared toxic by Canada. Available at: http://www.cbc.ca/health/story/2010/10/13/bpa-toxic.html
8 States Food and Drug Administration (2010) Update on Bisphenol A...
9 Health Canada (2008) Government of Canada Protects Families with Bisphenol A Regulations Available at: http://www.hc-sc.gc.ca/ahc-asc/media/nr-cp/_2008/2008_167-eng.php
10 CBC News (October 13, 2010) BPA declared toxic by Canada...
11 Kjellstrom, Tord et.al. (2006) Chapter 43: Air and Water Pollution...
12 Cassady, Alison & Alex Fidis (2007) Toxic Pollution and Health: An Analysis of Toxic Chemicals Released in Communities across the United States. U.S. PIRG Education Fund. Available at: http://cdn.publicinterestnetwork.org/assets/KTfes5EXnCLOgG9eWTKU6g/ToxicPollutionandHealth2007.pdf
13 World Health Organization (2010) Dioxins and their effects on human health. Available at: http://www.who.int/mediacentre/factsheets/fs225/en/index.html
14 Woolford, Julian & Noemi Cano Ed. (2006) Killing them softly...
15 Cassady, Alison & Alex Fidis (2007) Toxic Pollution and Health...
17 Natural Resources Defense Council (2010) Dosed Without Prescription: Preventing Pharmaceutical Contamination of Our Nation's Drinking Water. Available at: http://www.nrdc.org/health/files/dosed4pgr.pdf
18 Wright-Walters, Maxine & Conrad Volz (2009) Municipal Wastewater Concentrations of Pharmaceutical and Xeno-Estrogens: Wildlife and Human Health Implications. Available at: http://www.chec.pitt.edu/Exposure_concentration_of_Xenoestrogen_in_pharmaceutical_and_Municipal_Wastewater__Final8-28-07%5B1%5D.pdf; Daughton, Christian G. (N.D.) Pharmaceuticals and the Environment. Available at: www.epa.gov/osp/regions/emerpoll/daughton.ppt; Nikolaou, Anastasia; Meric, Sureyya & Despo Fatta (2007) "Occurrence patterns of pharmaceuticals in water and wastewater environments." Analytical and Bioanalytical Chemistry. 387: 1225-1234; Natural Resources Defense Council (2010) Dosed Without Prescription...
19 Daughton, Christian G. (N.D.) Pharmaceuticals and the Environment...
20 Environment Canada. (N.D.)Mercury and the Environment. Available at: http://www.ec.gc.ca/MERCURY/SM/EN/sm-mcp.cfm#MD
21 Health Care Without Harm (2007) The Global Movement for Mercury Free Health Care. Available at: http://www.noharm.org/lib/downloads/mercury/Global_Mvmt_Mercury-Free.pdf; World Health Organization (2005) Mercury in Health Care: Policy Paper. Available at: http://www.who.int/water_sanitation_health/medicalwaste/mercurypolpaper.pdf
22 Environmental Working Group (N.D.) Chemical Pollution: The Toll on America's Health. Available at: http://www.ewg.org/files/EWG-kid-safe-toll-on-health.pdf
23 California Environmental Protection Agency (2002) Environmental Protection Indicators...
24 Reuben, Suzanne H. (2010) Reducing Environmental Cancer Risk...
25 World Health Organization (N.D.) International Programme on Chemical Safety: About us. Available at: http://www.who.int/ipcs/en/; World Health Organization (N.D.) Inter-Organization Programme for the Sound Management of Chemicals. Available at: http://www.who.int/iomc/brochure/brochure_english.pdf; United Nations Economic Commission for Europe (N.D.) Globally Harmonized System of Classification and Labelling of Chemicals (GHS). Available at: http://www.unece.org/trans/danger/publi/ghs/ghs_welcome_e.html; Weinberg, Jack (2008) An NGO Guide to SAICM: The Strategic Approach to International Chemicals Management. Available at: http://www.ipen.org/ipenweb/documents/book/saicm%20introduction%20english.pdf
26 Eskenazi, Brenda et.al. (2009) "The Pine River Statement: Human Health Consequences of DDT Use." Environmental Health Perspectives. 117:1359-1367 Available at: http://www.eoearth.org/article/Human_Health_Consequences_of_DDT_Use#gen4; World Health Organization (N.D.) Rotterdam Convention: Share Responsibility. Available at: http://www.pic.int/home.php?type=t&id=5&sid=16
27 Kazan-Allen, Laurie (2007) Rotterdam Treaty Killed by Chrysotile Asbestos! International Ban Asbestos Secretariat. Available at: http://www.ibasecretariat.org/lka_rott_meet_geneva_oct_06.php
28 Government of Canada (2007) The Canadian Environmental Protection Act, 1999 (CEPA 1999). Available at: http://www.chemicalsubstanceschimiques.gc.ca/about-apropos/cepa-lcpe-eng.php
29 Government of Canada (2010) Chemicals Management Plan. Available at: http://www.chemicalsubstanceschimiques.gc.ca/plan/index-eng.php
The Canadian Medical Association (CMA) supports the promotion of healthy lifestyles in order to improve individual health and well-being and the overall health status of the population. Healthy lifestyles refer to patterns of individual practices and personal behavioural choices that are associated with optimal health. Two of the most important behaviours to create or maintain optimum health are healthy eating and physical activity.
For many Canadians, their diet and physical activity levels can have a negative rather than positive impact on their overall health. There is a particular concern for children and youth who are growing up in increasingly obesogenic environments that reinforce practices that work against a healthy lifestyle.1 Childhood obesity research tells us that overweight and obese children are more likely to stay the same into adulthood.2 To reverse this trend, determined action is required for children and youth to learn and acquire healthy behaviours that they will maintain throughout their life. Healthy lifestyles are central to successful aging and improving the likelihood of recovery after poor health.3
This policy paper discusses the importance of physical activity and healthy eating, and the role that individuals and families, schools, workplaces, communities, the food industry and all levels of governments can play in promoting healthy lifestyles. We know that collaborative action is required to make it easier for Canadians to incorporate healthy eating and physical activity into their daily lives - to make the healthy choice the easy choice.
What are the health impacts of unhealthy diets and physical inactivity
Diet is the leading risk factor for death, disability and life-years lost; being estimated to cause over 65,000 deaths and 864,000 life years lost in Canada in 2010.4
Unhealthy diet has been consistently linked with cardiovascular diseases (heart disease, stroke, hypertension, diabetes, dyslipidemia) and some cancers,5 which constitutes the majority of the disease burden in Canada. An estimated 80% of hypertension, which affects over 7 million Canadians, is directly or indirectly attributed to unhealthy diet.6
An estimated 60% of Canadian adults and close to one-third of children are overweight or obese, largely caused by unhealthy diets.7 Overweight and obesity (and the lifestyle choices associated with them) are contributors to more than 18 chronic conditions.8 This includes diabetes, cardiovascular disease, hypertension and liver disease, as well as breast, colon and prostate cancer.
Obesity is a public health issue not unique to Canada as the rates are increasing worldwide. Obesity is generally attributed to the fact that, as a society, we are increasing our calorie intake while at the same time burning less energy in physical activity. While it is difficult to determine how many deaths are directly attributable to obesity, we know that obesity often co-exists with other risk factors such as the lack of physical activity.
Exercise is one of the top modifiable risk factor for chronic disease.9 Regular physical activity is associated with a reduced risk of cardiovascular disease, some types of cancer, diabetes, obesity, hypertension, bone and joint diseases, and depression.10 The risk for many of these conditions is reduced by 20 - 40% in adults with the highest levels of physical activity compared to those with the lowest levels of physical activity. Recent research has shown that a sedentary lifestyle is associated with higher risk for chronic conditions such as obesity, diabetes and cancer independent of physical activity levels.11
According to the most recent Canadian Health Measures Study physical activity levels for children and youth are low with 6 out of 10 waking hours devoted to sedentary pursuits. Obesity is rising and physical fitness is declining.12
Canadians who do not achieve adequate levels of physical activity or eat unhealthy foods are vulnerable to preventable chronic diseases, premature death, and contribute to high health care costs. For instance, in 1999, $2.1 billion or 2.5% of the total direct health care costs were attributable to physical inactivity.13
To understand why the rates of obesity and overweight are rising, it may be helpful to look at what we already know about healthy eating and physical activity.
What we know about healthy eating
While modern science has allowed us to expand our knowledge of the impact of nutrients and food on human health we continue to be beset with illness and disease caused by the foods we consume. Having the right amount and type of food recommended in Canada's Food Guide is a first step towards healthy eating. But Canadians self-reported dietary intakes do not meet national dietary recommendations despite high reliance on public education concerning healthy eating and healthy diets. Children and adults are under-consuming the recommended servings of vegetables and fruits, an established proxy for healthy eating habits, and exceeding daily recommended intakes of sodium.14,15
As the links between nutrition and disease, and the impact on the health of our society are revealed it is more important than ever to understand what influences healthy eating behaviours. Food choices are structured by a variety of individual determinants of behaviour, ranging from one's physiological state, food preferences, nutritional knowledge, perceptions of healthy eating and psychological factors.
Many processed foods have become popular due to their accessibility and 'convenience factor', but these features have changed the way food and in particular these products are consumed compared to unprocessed foods: increased 'grazing', eating alone or eating while carrying out other activities such as work or driving. In addition, many calories consumed come in liquid form.16
Growth in the production and consumption of ultra-processed foods has increased drastically in the last decades in both higher and lower-income countries.17 A number of studies have shown that because less healthy foods are cheaper than healthier food, individuals from lower socioeconomic classes tend to be more dependent on unhealthy foods for nourishment.18
Other determinants for healthy eating include a wide range of contextual factors, such as the interpersonal environment created by family and peers, the physical environment, which determines food availability and accessibility, the economic environment, in which food is a commodity to be marketed for profit, and the social environment. Within the social environment, social status (income, education and gender) and cultural milieu are determinants of healthy eating that may be working "invisibly" to structure food choice.19
What we know about physical activity
Canada's Physical Activity Guidelines recommend that children and youth aged 5 to 17 get at least 60 minutes of moderate-to-vigorous physical activity (MVPA) per day; and adults get 150 minutes of physical activity per week.20 In fact, about 94% of Canadian children and youth do not meet minimum physical activity guidelines.21 Furthermore, about 85% of Canadian adults do not meet the minimum guidelines. Physical activity includes but is not limited to sports and recreation. Using active transportation to get to work as well as being active at work is an alternative form of MVPA and can also lead to improved health.
For most Canadians, the average day is spent on passive activities such as TV viewing, computer and game-console use, workplace sitting, and time spent in automobiles. Moreover, the sprawling suburban communities, in which many live, do not encourage physical activity.
Emerging research suggests that prolonged sitting time is associated with an increased health risk.22 These findings mean that one can meet the minimum physical activity guidelines and still not engage in a healthy lifestyle. Spending a few hours a week at the gym or otherwise engaged in moderate or vigorous activity doesn't seem to significantly offset the risk. Hence too much sitting is a risk distinct from too little exercise.
While further research is required to identify which methods of exercise promotions work best for individuals,23 it is clear that supportive environments and infrastructures are essential for Canadians to make physical activity part of their daily lives. CMA's policies about the Built Environment and Active Transportation support the role of the environment on our physical activity patterns.
How we can promote physical activity and healthy eating
A sedentary lifestyle is a cue for physician advice.24 Physical activity is a vital sign that may require as much attention as other traditional vital signs25 - weight, blood pressure, or smoking history. Physicians are eager to initiate these conversations, especially with patients living with chronic diseases. A message must be repeated many times in order to effect a change in lifestyle. Physicians can reiterate the medical importance of physical activity and healthy eating by reinforcing this message during each office visit, and writing the recommendation on a prescription pad.26 For instance, in British Columbia, physicians are prescribing exercise on specially-designed pads, distributing free pedometers, and hosting free walking events for their patients and the public. In the Edmonton area, Primary Care Networks are prescribing free access passes or a free month of access at local municipal recreation facilities. And in Nova Scotia, physicians have been running a free provincial running program for over 10 years that benefits thousands of kids in elementary school.
Nonetheless these clinical interventions alone cannot shape healthier food consumption patterns and lifestyle choices. An obvious starting point to develop a comprehensive policy is to understand the interplay between individual and environmental determinants that influence our behaviours. In this regard, CMA has developed policies on Active Transportation and the Built Environment and Health which recognize the role of neighborhood design and alternative modes for transportation for an active lifestyle. This approach is also at the heart of the Integrated Pan-Canadian Healthy Living Strategy (PCHLS)27, approved in 2005 by all levels of government. CMA commends the efforts put in the PCHLS to prioritize healthy eating and physical activity.
What we recommend
CMA looks forward to working with others in making options for physical activity and healthy eating more available and accessible to all Canadians. The following recommendations highlight the potential contributions of the following sectors: health professionals, all levels of government, communities, workplaces, schools, the food industry and individuals and families.
CMA encourages physicians to promote healthy eating and physical activity inside and outside their office.
Physicians are lifestyle change agents and remain the preferred source of information about health for many people. Physicians, who are committed to physical activity, are role models whose advice on healthy living is more likely to be adopted.28 CMA encourages physicians to address any work-imposed limitations - such as the lack of time, motivation, or tiredness - that could also influence their own exercise and eating habits.
In clinical practice, physicians can help patients start or maintain a healthy lifestyle by:
* assessing nutrition and physical activity as part of routine assessments;
* determining the factors that influence individual patient's nutrition and physical activity levels;
* assessing patient's readiness to change and tailoring interventions and support to their current situation;
* providing an exercise prescription to encourage physical activity to maintain or improve health status, and
* working in inter-professional teams to provide patient education with other health care providers such as dieticians.
Medical students and residents, while reporting a high level of importance for exercise prescription concede a low level of expertise in this area upon graduation.29,30,31 As knowledge develops, physicians and other health professionals should be kept updated and encouraged to incorporate the most effective interventions into their practices. The CMA encourages the development of continuing medical education courses on issues related to physical activity and healthy eating.
Within the healthy living approach, there are multiple opportunities to extend the role of physicians into the community as observed in Nova Scotia, British Columbia and Edmonton area. Physicians can establish strong community norms for a healthy lifestyle by:
* establishing and reinforcing healthy food policies in hospital cafeterias or at health-related meetings and conferences
* using, facilitating and advocating for the use of active transportation in their communities
* working within the community to ensure that recreation centres and other facilities are available and patients can be referred to the services most appropriate to their needs
Federal, Provincial, and Territorial Governments
CMA calls on federal, provincial, territorial and municipal governments to commit to a long-term, well-funded Canada-wide strategy for healthy living beyond 2015.
In 2005, Canada's federal, provincial, and territorial governments endorsed a 10-year Healthy Living Strategy Framework, whose initial priorities included the promotion of healthy eating and physical activity. The national strategy addressed information and support for Canadians to help them make healthy choices; support for physicians and other health professionals in counselling patients on healthy weight and in treating existing obesity; community infrastructures that make healthy living easier; and public policies that encourage healthy eating and physical activity. The federal and provincial / territorial governments have undertaken a number of activities in the intervening years to promote physical activity and healthy eating but much remains to be done.
CMA believes that all levels of governments have a continuous obligation to provide public guidance on healthy eating and to promulgate policies, standards, regulations and legislations that support the availability and accessibility of healthy and affordable food and beverage choices.
CMA calls on governments to improve access to nutritious food at affordable prices for all Canadians.
The price of milk, fresh produce and other healthy foods can vary greatly across Canada. In many remote areas, they are often more expensive than processed, nutrition-poor foods because of high transportation costs. Governments should implement effective programs to offset the impact of transportation costs on food prices in northern and remote communities. Even in urban areas, nutritious food may be unaffordable for people on low incomes. School meal programs, social assistance rates that take into account the cost of purchasing healthy food, access to urban farmers' markets can help to ensure that all Canadians have access to healthy foods at a reasonable price.
CMA calls on governments to ban marketing of foods and beverages high in salt, sugars and trans fats to those 13 years of age and younger.
The typical Canadian child may be exposed to as many as 40,000 advertisements for food a year.32 This does not include point-of-sale promotions, such as displays of candy bars at convenience-store counters. CMA's policy on marketing of unhealthy foods and beverages to children and youth calls for a ban on marketing of foods and beverages high in salt, sugars and trans fats to those 13 years of age and younger.
CMA calls on governments to set rigorous standards for front of package food labeling and for the advertising of health claims for food.
Brand-specific advertising is a less than optimal way to provide health information to consumers, who should be encouraged to seek out objective information sources for answers to their questions about physical activity and healthy eating. To improve the quality of information received through commercial channels, the CMA recommends that health claims made for foods be strictly regulated to ensure that they are based on the best available scientific evidence and that they are accurately communicated to consumers. Food advertisements should be pre-cleared before airing in the media, and the provisions against deceptive advertising in the Food and Drug Act should be strengthened.
CMA recommends that governments at all levels invest in evidence-based research on healthy eating and physical activity and share the results of this research with all Canadians.
CMA encourages all levels of governments to continue to fund and support research for healthy lifestyles. There is a clear need to invest in research to strengthen the evidence base about physical activity and healthy eating, particularly on:
best measures for assessing overweight and obesity;
the effectiveness of weight management and treatment programs; and
the effect of policy interventions on healthy eating and physical activity on rates of obesity and obesity-related disease.
CMA encourages governments to continue to work with the food industry to improve the food environment in Canada.
The partnership and collaboration of food manufacturers is needed to help Canadians make healthier food choices. The food industry can work with governments to:
reduce the salt, sugar, saturated fat, trans fat and calorie content of processed foods and pre-prepared meals;
provide information about the calorie and nutrition content on restaurant menus;
restrict advertising and in-store promotion of high-sugar, high-salt, high-fat foods, particularly those aimed at children;
provide user-friendly consumer information about their products, including and accurate health and advertising claims;
improve the nutrition fact table to make it more user friendly and increase the amount of information for example, by identifying the amount of free sugars.
CMA calls on municipal governments to create environments that encourage healthy and active living and on federal, provincial and territorial governments to support them in this endeavour.
Communities have an important role to play to promote healthy behaviours for children, youth, and adults. They shape how many Canadians decide to live, work and play in their daily life. Through mixed-use land planning and building design, communities can create walking-friendly environments, and reduce the time people spend in cars. To achieve this, communities should consider:
developing and maintaining a community-wide network of walking and cycling paths;
zoning communities in such a way that amenities are within walking distance of homes; and
revising building codes to make stairs accessible, pleasant and safe, so that people have an alternative to taking the elevator.
Canadians are considerably more physically active in the summer than in the winter and this could have an impact on obesity trends.33 Communities could improve pathways to healthy lifestyles year-round by improving access to indoor sport and recreation facilities, especially during winter. Where possible, communities should consider partnering with schools to share the use of gymnasiums, playgrounds, fields, courts, and tracks with the public after school hours and on weekends. In doing so, communities are ensuring the best use of time and resources, but also sharing liability for the development, operation, and maintenance of the facilities.
Community food security can happen if local residents have equal access to safe, affordable and nutritious food. Communities have a role to play in advocating for healthier food options in schools and workplaces, encouraging community kitchens to teach cooking skills, and supporting local agriculture and farmers markets. This, in turn, would encourage individuals to eat more healthy foods.
CMA encourages employers to actively promote the health of their employees by providing opportunities for physical activity, and healthy food choices in cafeterias.
Prolonged, unbroken time spent sitting in front of a screen is very common in the workplace. In addition, four out of five commuters sit daily in their private vehicles to go to work.34 As Canadians spend most of their adult life at work, it is important to reduce workplace sitting. CMA encourages employers, especially in sedentary occupational groups, to increase opportunities for physical activity. For example, employers can promote healthy behaviours by:
Building on-site fitness facilities or entering into agreements with off-site fitness centres to provide programs for their employees
Providing showers, bike racks and other amenities for employees for those who want to commute to work on foot or by bike.
Healthier food options in cafeteria and vending machines can promote and encourage healthy eating by employees.
Schools, where children spend most of their time outside of home, present an excellent opportunity to instil healthy behaviours at an early age. They could, for example, provide comprehensive nutrition education, serve nutritious food in their cafeterias and promote physical activity by providing formal instruction and informal recreation time. Schools can provide the most effective and efficient way to reach not only the children themselves, but their parents, teachers, and other community members.35
CMA encourages school boards to provide at least 60 minutes of active daily physical education for all primary and secondary grades.
Only 26% of Canadian schools reported that they had implemented daily physical education classes for their students.36 There is some evidence that school-based physical activity can increase physical activity levels and reduce time spent watching television at home. 37 For instance, schools can promote physical activity through unstructured out-of-home play, structured sports, or active transportation (e.g. walking to school). Children who are physically active and spend less time watching television after school are less likely to become overweight before age 12.38
CMA recommends that schools provide access to attractive, affordable, healthy food choices, provide nutrition education, and initiate programs aimed at encouraging healthy food consumption and skills to prepare meals from scratch.
CMA calls for restrictions on the sale of high-calorie, high fats, sugars or salts foods/drinks in recreational facilities frequented by young people.
Fast food restaurants and convenience stores can be an important influence on children's eating habits and food choices.39 Children attending schools within a short distance of fast food restaurants eat fewer fruits and vegetable servings, and drink more soft drinks than others who did not have similar establishments within proximity.40 To encourage effective school-based nutrition interventions, it is therefore important to educate students about the nutrition value of foods, healthy food choices, and provide healthy canteens or cafeterias.
Individuals and families
CMA recommends that all Canadians work toward achieving and maintaining health by:
educating themselves about their dietary needs and about the caloric and nutrition content of foods; and
engaging in physical activity, with the goal of at least 60 minutes of moderate activity per day for children and youth, and 150 minutes per week for adults.
Ultimately, healthy eating and physical activity require that individuals take action to make healthy choices in their lives. To inform these choices, Canadians should be supported with appropriate resource materials with consistent information about healthy eating and physical activity. For instance, many young children do not choose what they consume; their parents buy and prepare the food for them. Research suggests that mothers and children appear to have divergent attitudes towards food and mealtimes.41 In this regard, it is important for parents to be well-informed and able to explain the tangible benefits of foods and their nutritional components to their children before they reach adulthood.
What we conclude
Healthy behaviours are easier to maintain through life if acquired in childhood and encouraged by the family. Therefore Canadian families should be supported in efforts to ensure that both children and adults eat nutritiously and exercise daily. We believe there is a role for everyone in promoting healthy behaviours - including health professionals, individuals, families, schools, workplaces, communities, the food industry and all levels of governments.
Popular approaches seek to provide individuals with information and options about healthy lifestyles choices. However, individual choice is not sufficient to ensure healthy behaviours.
Many barriers to the adoption of healthy behaviours and lifestyle choices can be met through a targeted population health approach, and evidence-based policy and regulatory controls. A comprehensive change in culture and mindset, political endorsement and multifaceted strategies are needed to promote and facilitate change to improve the dietary practices and physical activity levels of Canadians.
Summary of Recommendations
1. The Canadian Medical Association encourages physicians to promote healthy eating and physical activity inside and outside their office.
2. The Canadian Medical Association calls on federal, provincial, territorial and municipal governments to commit to a long-term, well-funded Canada-wide strategy for healthy living beyond 2015.
3. The Canadian Medical Association calls on governments to improve access to nutritious food at affordable prices for all Canadians.
4. The Canadian Medical Association calls on governments to ban marketing of foods and beverages high in salt, sugars and trans fats to those 13 years of age and younger.
5. The Canadian Medical Association calls on governments to set rigorous standards for front of package food labeling and for the advertising of health claims for food.
6. The Canadian Medical Association recommends that governments at all levels invest in evidence-based research on healthy eating and physical activity and share the results of this research with all Canadians.
7. The Canadian Medical Association encourages governments to continue to work with the food industry to improve the food environment in Canada.
8. The Canadian Medical Association calls on municipal governments to create environments that encourage healthy and active living and on federal, provincial and territorial governments to support them in this endeavour.
9. The Canadian Medical Association encourages employers to actively promote the health of their employees by providing opportunities for physical activity, and healthy food choices in cafeterias.
10. The Canadian Medical Association encourages school boards to provide at least 60 minutes of active daily physical education for all primary and secondary grades.
11. The Canadian Medical Association recommends that schools provide access to attractive, affordable, healthy food choices, provide nutrition education, and initiate programs aimed at encouraging healthy food consumption and skills to prepare meals from scratch.
12. The Canadian Medical Association calls for restrictions on the sale of high-calorie, high fats, sugars or salts foods/drinks in recreational facilities frequented by young people.
13. The Canadian Medical Association recommends that all Canadians work toward achieving and maintaining health by:
* educating themselves about their dietary needs and about the caloric and nutrition content of foods; and
* engaging in physical activity, with the goal of at least 60 minutes of moderate activity per day for children and youth, and 150 minutes per week for adults.
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