8 April

It took quite a few years for the dangers of sugar to be taken seriously. Exercise will be a much tougher nut to crack, the idea that exercise is intrinsically good for you, and the more the better, is one of our deepest myths. There are a lot of people doing irreparable damage to their joints for example, and more disturbingly their hearts. The forces people put on their bodies are enormous, and those forces cause damage. They can even make cells cancerous, so it's not just 'physical' damage. Elite athletes are often sick. That should tell us something.