What is the optimal amount of protein to support post-exercise skeletal muscle reconditioning in the older adult?

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Deutscher übersetzter Titel:Welches ist die optimale Menge an Protein zur Unterstützung der Regeneration des Skelettmuskels nach dem Training bei älteren Erwachsenen?
Autor:Churchward-Venne, Tyler A.; Holwerda, Andrew M.; Phillips, Stuart M.; Loon, Luc J.C. van
Erschienen in:Sports medicine
Veröffentlicht:46 (2016), 9, S. 1205-1212, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Elektronische Ressource (online) Gedruckte Ressource
Sprache:Englisch
ISSN:0112-1642, 1179-2035
DOI:10.1007/s40279-016-0504-2
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Erfassungsnummer:PU201612008564
Quelle:BISp

Abstract des Autors

Hyperaminoacidemia following protein ingestion enhances the anabolic effect of resistance-type exercise by increasing the stimulation of muscle protein synthesis and attenuating the exercise-mediated increase in muscle protein breakdown rates. Although factors such as the source of protein ingested and the timing of intake relative to exercise can impact post-exercise muscle protein synthesis rates, the amount of protein ingested after exercise appears to be the key nutritional factor dictating the magnitude of the muscle protein synthetic response during post-exercise recovery. In younger adults, muscle protein synthesis rates after resistance-type exercise respond in a dose-dependent manner to ingested protein and are maximally stimulated following ingestion of ~20 g of protein. In contrast to younger adults, older adults are less sensitive to smaller doses of ingested protein (less than ~20 g) after exercise, as evidenced by an attenuated increase in muscle protein synthesis rates during post-exercise recovery. However, older muscle appears to retain the capacity to display a robust stimulation of muscle protein synthesis in response to the ingestion of greater doses of protein (~40 g), and such an amount may be required for older adults to achieve a robust stimulation of muscle protein synthesis during post-exercise recovery. The aim of this article is to discuss the current state of evidence regarding the dose-dependent relationship between dietary protein ingestion and changes in skeletal muscle protein synthesis during recovery from resistance-type exercise in older adults. We provide recommendations on the amount of protein that may be required to maximize skeletal muscle reconditioning in response to resistance-type exercise in older adults.