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Effect of betaine supplementation on power performance and fatigue

BACKGROUND: The purpose of this study was to examine the efficacy of 15 days of betaine supplementation on muscle endurance, power performance and rate of fatigue in active college-aged men. METHODS: Twenty-four male subjects were randomly assigned to one of two groups. The first group (BET; 20.4 ±...

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Autores principales: Hoffman, Jay R, Ratamess, Nicholas A, Kang, Jie, Rashti, Stefanie L, Faigenbaum, Avery D
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2009
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2651845/
https://www.ncbi.nlm.nih.gov/pubmed/19250531
http://dx.doi.org/10.1186/1550-2783-6-7
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author Hoffman, Jay R
Ratamess, Nicholas A
Kang, Jie
Rashti, Stefanie L
Faigenbaum, Avery D
author_facet Hoffman, Jay R
Ratamess, Nicholas A
Kang, Jie
Rashti, Stefanie L
Faigenbaum, Avery D
author_sort Hoffman, Jay R
collection PubMed
description BACKGROUND: The purpose of this study was to examine the efficacy of 15 days of betaine supplementation on muscle endurance, power performance and rate of fatigue in active college-aged men. METHODS: Twenty-four male subjects were randomly assigned to one of two groups. The first group (BET; 20.4 ± 1.3 years; height: 176.8 ± 6.6 cm; body mass: 77.8 ± 13.4 kg) consumed the supplement daily, and the second group (PL; 21.4 ± 4.7 years; height: 181.3 ± 5.9 cm; body mass: 83.3 ± 5.2 kg) consumed a placebo. Subjects were tested prior to the onset of supplementation (T1) and 7 (T2) and 14 days (T3) following supplementation. Each testing period occurred over a 2-day period. During day one of testing subjects performed a vertical jump power (VJP) and a bench press throw (BPT) power test. In addition, subjects were required to perform as many repetitions as possible with 75% of their 1-RM in both the squat and bench press exercises. Both peak and mean power was assessed on each repetition. On day two of testing subjects performed two 30-sec Wingate anaerobic power tests (WAnT), each test separated by a 5-min active rest. RESULTS: No differences were seen at T2 or T3 in the repetitions performed to exhaustion or in the number of repetitions performed at 90% of both peak and mean power between the groups in the bench press exercise. The number of repetitions performed in the squat exercise for BET was significantly greater (p < 0.05) than that seen for PL at T2. The number of repetitions performed at 90% or greater of peak power in the squat exercise was significantly greater for BET at both T2 and T3 than PL. No differences in any power assessment (VJP, BPT, WAnT) was seen between the groups CONCLUSION: Two-weeks of betaine supplementation in active, college males appeared to improve muscle endurance of the squat exercise, and increase the quality of repetitions performed.
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spelling pubmed-26518452009-03-06 Effect of betaine supplementation on power performance and fatigue Hoffman, Jay R Ratamess, Nicholas A Kang, Jie Rashti, Stefanie L Faigenbaum, Avery D J Int Soc Sports Nutr Research Article BACKGROUND: The purpose of this study was to examine the efficacy of 15 days of betaine supplementation on muscle endurance, power performance and rate of fatigue in active college-aged men. METHODS: Twenty-four male subjects were randomly assigned to one of two groups. The first group (BET; 20.4 ± 1.3 years; height: 176.8 ± 6.6 cm; body mass: 77.8 ± 13.4 kg) consumed the supplement daily, and the second group (PL; 21.4 ± 4.7 years; height: 181.3 ± 5.9 cm; body mass: 83.3 ± 5.2 kg) consumed a placebo. Subjects were tested prior to the onset of supplementation (T1) and 7 (T2) and 14 days (T3) following supplementation. Each testing period occurred over a 2-day period. During day one of testing subjects performed a vertical jump power (VJP) and a bench press throw (BPT) power test. In addition, subjects were required to perform as many repetitions as possible with 75% of their 1-RM in both the squat and bench press exercises. Both peak and mean power was assessed on each repetition. On day two of testing subjects performed two 30-sec Wingate anaerobic power tests (WAnT), each test separated by a 5-min active rest. RESULTS: No differences were seen at T2 or T3 in the repetitions performed to exhaustion or in the number of repetitions performed at 90% of both peak and mean power between the groups in the bench press exercise. The number of repetitions performed in the squat exercise for BET was significantly greater (p < 0.05) than that seen for PL at T2. The number of repetitions performed at 90% or greater of peak power in the squat exercise was significantly greater for BET at both T2 and T3 than PL. No differences in any power assessment (VJP, BPT, WAnT) was seen between the groups CONCLUSION: Two-weeks of betaine supplementation in active, college males appeared to improve muscle endurance of the squat exercise, and increase the quality of repetitions performed. BioMed Central 2009-02-27 /pmc/articles/PMC2651845/ /pubmed/19250531 http://dx.doi.org/10.1186/1550-2783-6-7 Text en Copyright © 2009 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
Ratamess, Nicholas A
Kang, Jie
Rashti, Stefanie L
Faigenbaum, Avery D
Effect of betaine supplementation on power performance and fatigue
title Effect of betaine supplementation on power performance and fatigue
title_full Effect of betaine supplementation on power performance and fatigue
title_fullStr Effect of betaine supplementation on power performance and fatigue
title_full_unstemmed Effect of betaine supplementation on power performance and fatigue
title_short Effect of betaine supplementation on power performance and fatigue
title_sort effect of betaine supplementation on power performance and fatigue
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2651845/
https://www.ncbi.nlm.nih.gov/pubmed/19250531
http://dx.doi.org/10.1186/1550-2783-6-7
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