Sumo wrestlers get so big primarily through a combination of a specialized high-calorie diet, intense training, and a unique lifestyle designed to maximize their size and strength. Their diet revolves around a high-protein, calorie-dense stew called chanko-nabe, which is loaded with meat, fish, vegetables, and tofu. They typically eat two massive meals a day, often skipping breakfast, to build and maintain their huge body mass. After eating, they rest or nap to help their bodies store fat efficiently. Their training focuses on strength and power rather than aerobic conditioning, which helps them gain muscle and leverage vital for sumo wrestling. Despite their size and apparent fat, sumo wrestlers are very strong and muscular under their fat, and their intense exercise helps them avoid some typical health risks associated with obesity. Their body fat tends to be under the skin rather than around vital organs, which is healthier. This blend of diet, training, and rest enables sumo wrestlers to develop and maintain their distinctive large and powerful physique.