Usain Bolt

Calories: 5,500

Exercise: 3.5 hours a day

Bolt has one of the most surprising diet routines on our list. According to The Huffington Post, he loves to eat chicken nuggets and wings in the morning before he hits the track — he ate an estimated 1,000 chicken nuggets while competing at the Beijing Olympics in 2012, according to Ladbrokes.

He maintains a diet made up of 60% protein, 30% carbs, and 10% fat, and often eats ackee and saltfish with dumplings, cooked banana, or sweet potato for breakfast.

Lunch is often made up of pasta with chicken, while dinner tends to be rice with peas and pork.

While he only trains 3.5 hours per day, compared to the eight hours undertaken by MMA champion Conor McGregor, he has said that he simply "concentrates on being the greatest at all times."