Boomers are shying away from the gym, with more than half avoiding regular exercise. With obesity and diabetes rates on the rise, older people are more health conscious than ever. How can the right mix of motivation and rewards tap into this lucrative demographic's desire to keep fit?

Thirty years ago, malnutrition and a lack of basic childcare meant infant mortality rates were high in Brazil – 8.3% in 1980. But while hunger now only affects 6.9% of the population, this doesn't mean they're healthy. Far from it, in fact: 51% of the country is overweight.

Burger fads and 1,000-calorie ready meals hardly fit in with a society that’s increasingly obsessed with healthy eating. But while these polarising trends paint a schizophrenic food landscape, they show how indulgent foods express our freedoms. After all, no one likes to be told what to eat.

Only 3% of the UK population identify as vegetarian. But thanks to a switch in tactics, the movement is gaining pace – and a weekly slot in people's stomachs. Can meat-free Michelin-starred restaurants, celebrity chefs, and veg delivery services cure people's appetite for meat?