Are the fitness benefits of riding your bike worth the risk of an accident? Lesley Evans Ogden takes a tour of seven cities on two wheels to find out.
What drives people to run a marathon? Join Hayley Birch as she tackles 26.2 miles, aided by science.
Can a grand vision of 4,000 free public gyms overcome inequality and fight Brazil’s health crisis? Catherine de Lange reports.
Lifestyle and economic changes are bringing an obesity crisis to South Africa and other low-income countries. Ian Birrell meets the people fighting to turn the tide.
Calories consumed minus calories burned: it’s the simple formula for weight loss or gain. But dieters often find that it doesn’t work. Cynthia Graber and Nicola Twilley of Gastropod investigate.
In East Harlem, four times as many people have diabetes as in the neighbouring Upper East Side. Meera Senthilingam meets the New Yorkers stopping poverty from being a death sentence.
Inside the debate about compulsory cycling helmets.
How do we get more women cycling?
What it’s really like training for a marathon – in pictures.
What to do if you’re tackling your first 26.2 miles.
More on Hayley’s trip to the biomechanics lab.
We put burning marathon questions to our panel.
Physical activity is seen as one of the best forms of medicine. But how much do you need to benefit?
For over 30 years, Brazil has hosted one of the largest studies of a population since birth.
For many, the 2014 World Cup is a missed opportunity to tackle health problems and inequality.