i know nothing about the south beach diet but when i was having some insulin issues and was worried i might become diabetic i started following the nutritional advice in a book called eat to live by dr furhman and it really changed my life. it is a way of eating where you eat a LOT of really healthy food but it is low calorie very nutrition food it is about nutrient density and he has good advice for people who exercise a lot. dr furhman was an Olympic figure skater at one point so he takes stuff like exercise into account.