Muscle damaging eccentric exercise attenuates disuse-induced declines in daily myofibrillar protein synthesis and transiently prevents muscle atrophy in healthy men
Tom S. O. Jameson, Sean P. Kilroe, Jonathan Fulford, Doaa R. Abdelrahman, Andrew J. Murton, Marlou L. Dirks, Francis B. Stephens, Benjamin T. Wall
Abstract
We investigated the impact of prior muscle-damaging eccentric exercise on disuse-induced muscle deconditioning. Two and 7 days of muscle disuse per se lowered quadriceps muscle volume in association with lowered daily myofibrillar protein synthesis (MyoPS). Prior eccentric exercise prevented the decline in muscle volume after 2 days and attenuated the decline in MyoPS after 2 and 7 days. These data indicate eccentric exercise increases MyoPS and transiently prevents quadriceps muscle atrophy during muscle disuse.
Topics & Concepts
MyofibrilAtrophyEccentricMuscle atrophyMuscle proteinEndocrinologyInternal medicineEccentric exerciseMedicineMuscle hypertrophySkeletal muscleMuscle damagePhysicsQuantum mechanicsMuscle Physiology and DisordersMuscle metabolism and nutritionExercise and Physiological Responses