They skip breakfast to slow down their metabolism. Eat lots of rice with mixed meat and vegetables for lunch. They eat more meat and drink alcohol post workout. Then for dinner they eat a more reasonable, power lifter type meal like chicken and potatoes.
In the last 12-15 years, sumo has changed a lot and you'll now see a lot of wrestlers who lift weights, eat nutritious, but in enormous volumes, and probably have a lower percentage of body fat. When Mongolian and Samoan wrestlers started beating the Japanese, they really had to take a hard look at revamping some of their traditions.
Wikipedia has 6-8 links to interesting articles about sumo, but http://www.sumo.or.jp/eng/ will have everything you're interested in.
· 1 decade ago