43. David Beckham
You’d never expect this of one of the greatest athletes, but David Beckham struggles with asthma, a respiratory condition. It’s been over ten years since he announced this diagnosis, and he has it all under control thanks to a healthy diet. Science shows that a healthy diet is linked to a reduction in asthma symptoms as well as helping keep this condition under control. David Beckham makes sure to keep a diet of lean meat and a lot of leafy vegetables and enjoys healthy fats from yogurt and olive oil.