The protein requirements of athletes is approximately 12 18gkg body weight compared with 08 09gkg body weight for less active individuals for heavy athletes this extra requirement is especially important muscle mass is increased by the rate of anabolism and destroyed by the rate of catabolism during exercise the whey protein in nutrisport 90 protein is absorbed quickly having a very high biological value and an anabolic effect that lasts a couple of hours the micellar casein in 90