Details

Autor(en) / Beteiligte

• Spillane, Mike
• Emerson, Christamarie
• Willoughby, Darryn S

Titel

The effects of 8 weeks of heavy resistance training and branched-chain amino acid supplementation on body composition and muscle performance

Ist Teil von

• Nutrition and health (Berkhamsted), 2012-10, Vol.21 (4), p.263-273

Ort / Verlag

London, England: SAGE Publications

Erscheinungsjahr

2012

Quelle

MEDLINE

Beschreibungen/Notizen

• 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.