Why do you need wheat and rices in sport?

Answer 1

Rices, pasta and wheat are part of the 'long burning carbohydrates'. These burn for a longer period of time, and release energy slowly, rather than sugar- a 'short burning carbohydrate', which releases a huge amount of energy in a couple of minutes. This is why marathon runners take a diet, then two days before the race, they eat lots of carbohydrates, so their bodies will release energy during the race. Hence, they have the stamina.