Very good morning doctors. what does joey chestnut do in order to prepare to eat all of those hot dogs during the nathans hot dog eating contest? how does he not get sick?

The stomach is a very elastic organ which can be trained to enlarge as much as 15-20 times its normal size. As part of his training, Mr Chestnut probably practices eating large quantities of food in very short times, thus increasing the elasticity of his stomach. He has the added benefit of a slender body, which reduces the pressure of intrabdominal fat and organs on the stomach.