Protein, Caffeine, and Sports

In brief What are optimal levels of protein for active people? And how does caffeine affect athletic performance? Substantial evidence indicates that endurance athletes' protein requirements are 50% to 100% higher than the average person's. Recent evidence suggests that resistance athletes have protein requirements similar to endurance athletes'; however, neither resistance nor endurance athletes benefit from excessive protein supplementation. Much evidence shows that caffeine is ergogenic in prolonged endurance exercise, but there is no evidence that it improves performance in resistance or power sports.