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Efficacy of phosphatidic acid ingestion on lean body mass, muscle thickness and strength gains in resistance-trained men

BACKGROUND: Phosphatidic acid (PA) has been reported to activate the mammalian target of rapamycin (mTOR) signaling pathway and is thought to enhance the anabolic effects of resistance training. The purpose of this pilot study was to examine if oral phosphatidic acid administration can enhance stren...

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Autores principales: Hoffman, Jay R, Stout, Jeffrey R, Williams, David R, Wells, Adam J, Fragala, Maren S, Mangine, Gerald T, Gonzalez, Adam M, Emerson, Nadia S, McCormack, William P, Scanlon, Tyler C, Purpura, Martin, Jäger, Ralf
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3506449/
https://www.ncbi.nlm.nih.gov/pubmed/23035701
http://dx.doi.org/10.1186/1550-2783-9-47
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author Hoffman, Jay R
Stout, Jeffrey R
Williams, David R
Wells, Adam J
Fragala, Maren S
Mangine, Gerald T
Gonzalez, Adam M
Emerson, Nadia S
McCormack, William P
Scanlon, Tyler C
Purpura, Martin
Jäger, Ralf
author_facet Hoffman, Jay R
Stout, Jeffrey R
Williams, David R
Wells, Adam J
Fragala, Maren S
Mangine, Gerald T
Gonzalez, Adam M
Emerson, Nadia S
McCormack, William P
Scanlon, Tyler C
Purpura, Martin
Jäger, Ralf
author_sort Hoffman, Jay R
collection PubMed
description BACKGROUND: Phosphatidic acid (PA) has been reported to activate the mammalian target of rapamycin (mTOR) signaling pathway and is thought to enhance the anabolic effects of resistance training. The purpose of this pilot study was to examine if oral phosphatidic acid administration can enhance strength, muscle thickness and lean tissue accruement during an 8-week resistance training program. METHODS: Sixteen resistance-trained men were randomly assigned to a group that either consumed 750 mg of PA (n = 7, 23.1 ± 4.4 y; 176.7 ± 6.7 cm; 86.5 ± 21.2 kg) or a placebo (PL, n = 9, 22.5 ± 2.0 y; 179.8 ± 5.4 cm; 89.4 ± 13.6 kg) group. During each testing session subjects were assessed for strength (one repetition maximum [1-RM] bench press and squat) and body composition. Muscle thickness and pennation angle were also measured in the vastus lateralis of the subject’s dominant leg. RESULTS: Subjects ingesting PA demonstrated a 12.7% increase in squat strength and a 2.6% increase in LBM, while subjects consuming PL showed a 9.3% improvement in squat strength and a 0.1% change in LBM. Although parametric analysis was unable to demonstrate significant differences, magnitude based inferences indicated that the Δ change in 1-RM squat showed a likely benefit from PA on increasing lower body strength and a very likely benefit for increasing lean body mass (LBM). CONCLUSIONS: Results of this study suggest that a combination of a daily 750 mg PA ingestion, combined with a 4-day per week resistance training program for 8-weeks appears to have a likely benefit on strength improvement, and a very likely benefit on lean tissue accruement in young, resistance trained individuals.
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spelling pubmed-35064492012-11-27 Efficacy of phosphatidic acid ingestion on lean body mass, muscle thickness and strength gains in resistance-trained men Hoffman, Jay R Stout, Jeffrey R Williams, David R Wells, Adam J Fragala, Maren S Mangine, Gerald T Gonzalez, Adam M Emerson, Nadia S McCormack, William P Scanlon, Tyler C Purpura, Martin Jäger, Ralf J Int Soc Sports Nutr Research Article BACKGROUND: Phosphatidic acid (PA) has been reported to activate the mammalian target of rapamycin (mTOR) signaling pathway and is thought to enhance the anabolic effects of resistance training. The purpose of this pilot study was to examine if oral phosphatidic acid administration can enhance strength, muscle thickness and lean tissue accruement during an 8-week resistance training program. METHODS: Sixteen resistance-trained men were randomly assigned to a group that either consumed 750 mg of PA (n = 7, 23.1 ± 4.4 y; 176.7 ± 6.7 cm; 86.5 ± 21.2 kg) or a placebo (PL, n = 9, 22.5 ± 2.0 y; 179.8 ± 5.4 cm; 89.4 ± 13.6 kg) group. During each testing session subjects were assessed for strength (one repetition maximum [1-RM] bench press and squat) and body composition. Muscle thickness and pennation angle were also measured in the vastus lateralis of the subject’s dominant leg. RESULTS: Subjects ingesting PA demonstrated a 12.7% increase in squat strength and a 2.6% increase in LBM, while subjects consuming PL showed a 9.3% improvement in squat strength and a 0.1% change in LBM. Although parametric analysis was unable to demonstrate significant differences, magnitude based inferences indicated that the Δ change in 1-RM squat showed a likely benefit from PA on increasing lower body strength and a very likely benefit for increasing lean body mass (LBM). CONCLUSIONS: Results of this study suggest that a combination of a daily 750 mg PA ingestion, combined with a 4-day per week resistance training program for 8-weeks appears to have a likely benefit on strength improvement, and a very likely benefit on lean tissue accruement in young, resistance trained individuals. BioMed Central 2012-10-05 /pmc/articles/PMC3506449/ /pubmed/23035701 http://dx.doi.org/10.1186/1550-2783-9-47 Text en Copyright ©2012 Hoffman et al.; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Hoffman, Jay R
Stout, Jeffrey R
Williams, David R
Wells, Adam J
Fragala, Maren S
Mangine, Gerald T
Gonzalez, Adam M
Emerson, Nadia S
McCormack, William P
Scanlon, Tyler C
Purpura, Martin
Jäger, Ralf
Efficacy of phosphatidic acid ingestion on lean body mass, muscle thickness and strength gains in resistance-trained men
title Efficacy of phosphatidic acid ingestion on lean body mass, muscle thickness and strength gains in resistance-trained men
title_full Efficacy of phosphatidic acid ingestion on lean body mass, muscle thickness and strength gains in resistance-trained men
title_fullStr Efficacy of phosphatidic acid ingestion on lean body mass, muscle thickness and strength gains in resistance-trained men
title_full_unstemmed Efficacy of phosphatidic acid ingestion on lean body mass, muscle thickness and strength gains in resistance-trained men
title_short Efficacy of phosphatidic acid ingestion on lean body mass, muscle thickness and strength gains in resistance-trained men
title_sort efficacy of phosphatidic acid ingestion on lean body mass, muscle thickness and strength gains in resistance-trained men
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3506449/
https://www.ncbi.nlm.nih.gov/pubmed/23035701
http://dx.doi.org/10.1186/1550-2783-9-47
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