alexa The time course for elevated muscle protein synthesis following heavy resistance exercise.
Physicaltherapy & Rehabilitation

Physicaltherapy & Rehabilitation

Journal of Sports Medicine & Doping Studies

Author(s): MacDougall JD, Gibala MJ, Tarnopolsky MA, MacDonald JR, Interisano SA,

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Abstract It has been shown that muscle protein synthetic rate (MPS) is elevated in humans by 50\% at 4 hrs following a bout of heavy resistance training, and by 109\% at 24 hrs following training. This study further examined the time course for elevated muscle protein synthesis by examining its rate at 36 hrs following a training session. Six healthy young men performed 12 sets of 6- to 12-RM elbow flexion exercises with one arm while the opposite arm served as a control. MPS was calculated from the in vivo rate of incorporation of L-[1,2-13C2] leucine into biceps brachii of both arms using the primed constant infusion technique over 11 hrs. At an average time of 36 hrs postexercise, MPS in the exercised arm had returned to within 14\% of the control arm value, the difference being nonsignificant. It is concluded that following a bout of heavy resistance training, MPS increases rapidly, is more than double at 24 hrs, and thereafter declines rapidly so that at 36 hrs it has almost returned to baseline.
This article was published in Can J Appl Physiol and referenced in Journal of Sports Medicine & Doping Studies

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