PURPOSE: This study determined the effects of 8 weeks of heavy resistance training combined with branched-chain amino acid (BCAA) supplementation on body composition and muscle performance. METHODS:Resistance training was performed by 19 non-resistance-trained males (three sets of 8-10 repetitions) four times/week, for 8 weeks, while also ingesting 9 g/day of BCAA or 9 g/day of placebo (PLAC) on the exercise days only (one-half of total dose 30 min before and after exercise). Data were analyzed with separate 2 × 2 analysis of variance (ANOVA) (p < 0.05). RESULTS: For total body mass, neither group significantly increased with training (p = 0.593) and also, there were no significant changes in total body water (p = 0.517). In addition, no training- or supplement-induced (p = 0.783) changes occurred with fat mass or fat-free mass (p = 0.907). Upper-body (p = 0.047) and lower-body strength (p = 0.044) and upper- (p = 0.001) and lower-body muscle endurance (p = 0.013) increased with training; however, these increases were not different between the groups (p > 0.05). CONCLUSION: When combined with heavy resistance training for 8 weeks, supplementation with 9 g/day of BCAA 30 min before and after exercise had no preferential effects on body composition and muscle performance.
RCT Entities:
PURPOSE: This study determined the effects of 8 weeks of heavy resistance training combined with branched-chain amino acid (BCAA) supplementation on body composition and muscle performance. METHODS: Resistance training was performed by 19 non-resistance-trained males (three sets of 8-10 repetitions) four times/week, for 8 weeks, while also ingesting 9 g/day of BCAA or 9 g/day of placebo (PLAC) on the exercise days only (one-half of total dose 30 min before and after exercise). Data were analyzed with separate 2 × 2 analysis of variance (ANOVA) (p < 0.05). RESULTS: For total body mass, neither group significantly increased with training (p = 0.593) and also, there were no significant changes in total body water (p = 0.517). In addition, no training- or supplement-induced (p = 0.783) changes occurred with fat mass or fat-free mass (p = 0.907). Upper-body (p = 0.047) and lower-body strength (p = 0.044) and upper- (p = 0.001) and lower-body muscle endurance (p = 0.013) increased with training; however, these increases were not different between the groups (p > 0.05). CONCLUSION: When combined with heavy resistance training for 8 weeks, supplementation with 9 g/day of BCAA 30 min before and after exercise had no preferential effects on body composition and muscle performance.
Entities:
Keywords:
Amino acid; body composition; exercise; muscle mass; muscle performance; muscle strength; supplementation; weight training
Authors: Chad M Kerksick; Colin D Wilborn; Michael D Roberts; Abbie Smith-Ryan; Susan M Kleiner; Ralf Jäger; Rick Collins; Mathew Cooke; Jaci N Davis; Elfego Galvan; Mike Greenwood; Lonnie M Lowery; Robert Wildman; Jose Antonio; Richard B Kreider Journal: J Int Soc Sports Nutr Date: 2018-08-01 Impact factor: 5.150
Authors: Thomas L Andre; Joshua J Gann; Sarah K McKinley-Barnard; Joon J Song; Darryn S Willoughby Journal: J Sports Sci Med Date: 2016-08-05 Impact factor: 2.988
Authors: Paulo Gentil; Claudio Andre Barbosa de Lira; Antonio Paoli; José Alexandre Barbosa Dos Santos; Roberto Deivide Teixeira da Silva; José Romulo Pereira Junior; Edson Pereira da Silva; Rodrigo Ferro Magosso Journal: Eur J Transl Myol Date: 2017-03-24