Team GB athletes' diets interactive: Olympic athletes will eat from as little as 1500 calories to as many as 6000 calories a day. With the help of expert nutritionists, explore our graphic of swimmers, triathletes, canoe slalom paddlers, boxers, and sailors and compare with the average Briton's diet.
Triathletes Jonathan Brownlee (L) and Alistair Brownlee attend the Team GB Ball at Battersea Evolution on November 30, 2016 in London, England.
David McNamee is a former Team GB athlete and only recently made the transition to long distance triathlon. He had a great season in 2015, his first year at the Ironman distance, winning Ironman UK and finishing 11th in his debut at the World Championship in Hawaii (fastest marathon time)