Tour de France riders don't wear diapers. At that level of exertion, the digestive and excratory systems shut down and there is no need to pee, especially because you lose all of your fluids via sweating.
Tour de France riders don't wear diapers. At that level of exertion, the digestive and excratory systems shut down and there is no need to pee, especially because you lose all of your fluids via sweating.