What’s going on inside your brain when you exercise, after you exercise, and what happens when you don’t? These are the questions Dr Brendon Stubbs is trying to resolve with his research. He’s one of the most cited scientists in the world, focusing on the link between physical activity and mental health, the mind-body interface and healthy ageing. Exercise is one of the best ways to beat anxiety and depression and reduce stress, so how much do you need, when and how often?