Muscle protein synthesis, which increases after exercise, is a measure of how well muscle adapts to exercise, not the same as muscle protein accretion.

“so first thing is um protein synthesis is not the same as muscle protein accretion so the building of muscle is not the same as reconditioning when people like Stu Phillips myself we measure muscle dri protein synthesis now the muscle protein synthesis goes up after exercise when you do endurance type exercise but also when you do resistance type exercise the long-term adaptation of course is completely different look at the physique of a marathon runner and a bodybuilder they're hugely different but they both have very high muscle protein synthesis after a training session so the protein synthesis is a meas of to what extent does the muscle recondition to become more adapted to the type of exercise that you perform”