Q: Does lifting heavy weights and taking whey protein supplements after workout affect the functioning of the kidneys?

A:Extraordinary muscular effort can lead to bleeding from the kidneys and in some cases there is breakdown of muscle tissue that can induce kidney impairment or even failure with dire consequences. It is important to maintain adequate (but not excessive) fluid intake during strenuous or prolonged exercise. Eating whey products is unlikely to have significant effects in otherwise healthy weight lifters.