a small study of triathletes in their fifties showing that rates of muscle protein synthesis in these masters athletes were lower than those of athletes in their twenties.1 His research suggests that older athletes may have an “anabolic resistance” to protein that makes it harder for their bodies to convert protein into muscle, and that may help explain why it takes longer for them to repair exercise-induced muscle damage. (It’s also an argument for keeping your protein intake up as you age.)
