Jonny Wilkinson (Rugby Player)(01 of09)
Open Image ModalThe England rugby ace puts away 3,000 calories each day, starting off with muesli, fruit, skimmed milk and an egg white omelette.For lunch he'll scoff pasta, potatoes, chicken and salad before eating oily fish, chicken and vegetables for dinner. (credit:ASSOCIATED PRESS)
Tom Daley (Diver)(02 of09)
Open Image ModalDaley dines on beans on toast and fruit in the morning, snacking on cereal bars, soup, chocolate milkshakes and chocolate spread on toast throughout the day.A typical lunch involves grilled chicken and a jacket potato while dinner features chicken, steamed vegetables and pasta.That all adds up to 3,200 calories fulling his body for a day of training. (credit:ASSOCIATED PRESS)
Peter Vanderkaay (Swimmer)(03 of09)
Open Image ModalThe American swimmer kicks off his days with a 5 egg white omelette, and yoghurt with fruit and granola. Snacking on power bars through to lunch, he then throws back a peanut butter and jelly sandwich and some chocolate milk.A normal dinner involves chicken, rice and asparagus, totting up 3,220 calories each day. (credit:ASSOCIATED PRESS)
Ryan Lochte (Swimmer)(04 of09)
Open Image ModalWhile at the 2008 Beijing Olympics, Ryan Lochte didn't much care for the local cuisine so dined on a diet of McDonald's. He would start the day with a Big Breakfast, McMuffins, hash browns and fruit before returning for lunch which involved McNuggets, a double cheeseburger and a Big Mac.He would eat the same meal again for dinner, adding fries. The result? 5,800 calories daily. (credit:ASSOCIATED PRESS)
Usain Bolt (Sprinter)(05 of09)
Open Image ModalThe world's fastest man was in a similar position in Beijing, so he took to eating Chicken McNuggets and fries for every meal.That fuelled the sprinter with 5,500 calories each day. (credit:John Giles/PA Wire)
Louis Smith (Gymnast)(06 of09)
Open Image ModalBack into the world of non-fast food, this British gymnast eats scrambled egg on toast and fruit for breakfast, ham tomato and cucumber pasta for lunch, and chicken with steamed veggies and salad for dinner.He needs a lot of it for training though, putting back 3,780 calories per day. (credit:ASSOCIATED PRESS)
Andy Murray (Tennis Player)(07 of09)
Open Image ModalMurray denies his Scottish roots by ditching porridge for breakfast in favour of fruits, bagels and smoothies.He fills up between meals on protein shakes and energy drinks, and enjoys salmon and rice for lunch. Scottish salmon, we imagine.Much like the rest of the athletes on this list, dinner for Murray is chicken, steamed veg and potatoes, pulling in 3,200 calories. (credit:ASSOCIATED PRESS)
Dwayne "The Rock" Johnson (Bodybuilder)(08 of09)
Open Image ModalMichael Phelps (Swimmer)(09 of09)
Open Image ModalPhelps is well known for his ridiculous diet, which fuels his workouts to the tune of 12,500 calories each day.He starts with three fried egg sandwiches, oatmeal and blueberries. Throughout the course of a day he'll add french toast, chocolate chip pancakes, a five egg omelette, one extra large pepperoni pizza, energy drinks, 1kg of pasta and two ham and cheese sandwiches. (credit:PATRICK HAMILTON via Getty Images)