By Kevin Lam and Jean Wang
Since John Snow mapped out the large cholera outbreak in 1854 to where people lived in London, U.K., it has been known that where we live, work and play strongly influences people's health. The way that our cities and towns have been built plays a large role in many of the health conditions that Canadians develop. Cities like Montreal and Vancouver have been working in recent years to better cycling infrastructure and public transit, with the goals of improving the quality of life and health of their citizens.
It's a good start, but is it enough? We need a systemic collaboration between physicians, public health departments, developers and urban planners to help Canada design the cities we want — ones that can keep us healthy.
Let's take obesity as an example.
Among OECD countries, Canada has one of the highest prevalence rates of obesity, with an alarming one in five Canadian adults affected. Yet despite all that Canada is doing to address the lifestyle factors that contribute to obesity, many public health goals are stubbornly hard to reach and nowhere near close to targets. Ninety per cent of Canadian children do not reach the current physical activity recommendations despite physical inactivity and sedentary lifestyles being flagged as a priority focus for the Public Health Agency of Canada.
It can be difficult to make healthy choices in certain contexts. If our daily lives are surrounded by cities without green spaces to play or where public transit is difficult to access, it can be hard to make healthy choices in spite of all the health promoting.
So what can be done?
Current solutions are heavily focused on targeting individual behaviour change. A great deal of funding is spent on promoting exercise, the food guide, community weight loss programs — all with a focus on individual behaviour. But evidence demonstrates that social marketing campaigns surrounding healthy eating and exercise are not sufficient to address the problem.
Instead of simply telling people to spend more time exercising, we can incorporate it into their everyday lives. We could encourage stair use instead of elevators by making stairs easier to access. We could integrate walking and biking to work — forms of active transport — or make cities more walkable in general.
This is an area where physicians and public health departments can collaborate with built environment experts to influence health.
Urban planners are the experts at improving the livability of towns, cities and regions. Meanwhile, physicians see the downstream effects of a poorly built environment in their clinics, operating theatres and emergency rooms every day — from chronic diseases to motor vehicle collisions.
The future of chronic disease and obesity prevention involves professions working together across silos to generate collaborative solutions. We need to work together for better places to live, play and work.
Many studies have demonstrated that active transport is associated with a decreased risk of developing chronic illness. Physical activityreducesthe riskof cardiovascular disease, including a reduction in heart attacks, strokes and heart failure by up to 11 per cent. Systematic reviews, which pool together the results of multiple studies, also demonstrate that active transportis associated with a reduced risk of obesity, type 2 diabetes and high blood pressure.
With the large health benefits that can be realised from encouraging more active transport, health workers have an important role in advocating for and working with their urban planning colleagues to implement these ideas.
How can we take action?
It's time for health workers to speak up and get involved to help improve neighbourhoods for everyone. Urban planners can also help with determining the health impact of land-use and transport decisions by working with public health departments.
The good news? This collaboration is already starting to happen in some places.
And various areas across Canada, including in Toronto, Vancouver and the Region of Peel, are employing urban planners to examine the impact of different developments on the health of a community. This means new developments and existing ones are being built to encourage more active transportation.
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Furthermore, the Canadian Association of Physicians for the Environment has started a campaign advocating governments to adopt a national active transport strategy, which was one of the main recommendations in a reported released by the CPHA-Lancet Countdown Briefing for Canadian Policymakers.
The future of chronic disease and obesity prevention involves working together across silos to generate collaborative solutions. We need to fight together for better places in which to live, play and work.
Jean Wang is a second year medical student at the University of Ottawa. She completed herBachelor of Health Sciences at McMaster University and has previously been involved in chronic disease management and prevention research.
Kevin Lam is a second year medical student at McMaster University. He has an interest in public health and its intersection with emergency medicine, with a special focus on improving health through urban design. He studied epidemiology and biostatistics in his undergraduate studies at Western University.
They are both Contributors to EvidenceNetwork.ca based at the University of Winnipeg.
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