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Pre- versus post-exercise protein intake has similar effects on muscular adaptations

The purpose of this study was to test the anabolic window theory by investigating muscle strength, hypertrophy, and body composition changes in response to an equal dose of protein consumed either immediately pre- versus post-resistance training (RT) in trained men. Subjects were 21 resistance-train...

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Autores principales: Schoenfeld, Brad Jon, Aragon, Alan, Wilborn, Colin, Urbina, Stacie L., Hayward, Sara E., Krieger, James
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5214805/
https://www.ncbi.nlm.nih.gov/pubmed/28070459
http://dx.doi.org/10.7717/peerj.2825
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author Schoenfeld, Brad Jon
Aragon, Alan
Wilborn, Colin
Urbina, Stacie L.
Hayward, Sara E.
Krieger, James
author_facet Schoenfeld, Brad Jon
Aragon, Alan
Wilborn, Colin
Urbina, Stacie L.
Hayward, Sara E.
Krieger, James
author_sort Schoenfeld, Brad Jon
collection PubMed
description The purpose of this study was to test the anabolic window theory by investigating muscle strength, hypertrophy, and body composition changes in response to an equal dose of protein consumed either immediately pre- versus post-resistance training (RT) in trained men. Subjects were 21 resistance-trained men (>1 year RT experience) recruited from a university population. After baseline testing, participants were randomly assigned to 1 of 2 experimental groups: a group that consumed a supplement containing 25 g protein and 1 g carbohydrate immediately prior to exercise (PRE-SUPP) (n = 9) or a group that consumed the same supplement immediately post-exercise (POST-SUPP) (n = 12). The RT protocol consisted of three weekly sessions performed on non-consecutive days for 10 weeks. A total-body routine was employed with three sets of 8–12 repetitions for each exercise. Results showed that pre- and post-workout protein consumption had similar effects on all measures studied (p > 0.05). These findings refute the contention of a narrow post-exercise anabolic window to maximize the muscular response and instead lends support to the theory that the interval for protein intake may be as wide as several hours or perhaps more after a training bout depending on when the pre-workout meal was consumed.
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spelling pubmed-52148052017-01-09 Pre- versus post-exercise protein intake has similar effects on muscular adaptations Schoenfeld, Brad Jon Aragon, Alan Wilborn, Colin Urbina, Stacie L. Hayward, Sara E. Krieger, James PeerJ Anatomy and Physiology The purpose of this study was to test the anabolic window theory by investigating muscle strength, hypertrophy, and body composition changes in response to an equal dose of protein consumed either immediately pre- versus post-resistance training (RT) in trained men. Subjects were 21 resistance-trained men (>1 year RT experience) recruited from a university population. After baseline testing, participants were randomly assigned to 1 of 2 experimental groups: a group that consumed a supplement containing 25 g protein and 1 g carbohydrate immediately prior to exercise (PRE-SUPP) (n = 9) or a group that consumed the same supplement immediately post-exercise (POST-SUPP) (n = 12). The RT protocol consisted of three weekly sessions performed on non-consecutive days for 10 weeks. A total-body routine was employed with three sets of 8–12 repetitions for each exercise. Results showed that pre- and post-workout protein consumption had similar effects on all measures studied (p > 0.05). These findings refute the contention of a narrow post-exercise anabolic window to maximize the muscular response and instead lends support to the theory that the interval for protein intake may be as wide as several hours or perhaps more after a training bout depending on when the pre-workout meal was consumed. PeerJ Inc. 2017-01-03 /pmc/articles/PMC5214805/ /pubmed/28070459 http://dx.doi.org/10.7717/peerj.2825 Text en ©2017 Schoenfeld et al. http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Anatomy and Physiology
Schoenfeld, Brad Jon
Aragon, Alan
Wilborn, Colin
Urbina, Stacie L.
Hayward, Sara E.
Krieger, James
Pre- versus post-exercise protein intake has similar effects on muscular adaptations
title Pre- versus post-exercise protein intake has similar effects on muscular adaptations
title_full Pre- versus post-exercise protein intake has similar effects on muscular adaptations
title_fullStr Pre- versus post-exercise protein intake has similar effects on muscular adaptations
title_full_unstemmed Pre- versus post-exercise protein intake has similar effects on muscular adaptations
title_short Pre- versus post-exercise protein intake has similar effects on muscular adaptations
title_sort pre- versus post-exercise protein intake has similar effects on muscular adaptations
topic Anatomy and Physiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5214805/
https://www.ncbi.nlm.nih.gov/pubmed/28070459
http://dx.doi.org/10.7717/peerj.2825
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