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In a single-blind, matched group design: branched-chain amino acid supplementation and resistance training maintains lean body mass during a caloric restricted diet
Wesley David Dudgeon*, Elizabeth Page Kelley and Timothy Paul Scheett
Author Affiliations
Department of Health and Human Performance, College of Charleston, 24 George Street, Charleston 29424, SC, USA
Journal of the International Society of Sports Nutrition 2016, 13:1 doi:10.1186/s12970-015-0112-9
Received: 20 August 2015
Accepted: 17 December 2015
Published: 5 January 2016
Abstract
Background
Athletes and active adults many times have the goal of improving/maintaining fitness while losing weight and this is best achieved by caloric restriction in combination with exercise. However, this poses a risk for lean tissue loss, which can limit performance. Thus, the purpose of this study was to determine the effectiveness of a branched-chain amino acid (BCAA) supplement, in conjunction with heavy resistance training and a carbohydrate caloric-restricted “cut diet” on body composition and muscle fitness.
Methods
Seventeen resistance-trained males (21–28 years of age) were randomized to a BCAA group (n = 9) or a carbohydrate (CHO) group (n = 8) who both received their respective supplement during the 8 weeks of a prescribed body building style resistance training protocol. Subjects were prescribed a hypocaloric diet (based upon pre-intervention analysis) that was to be followed during the study.
Results
The BCAA group lost fat mass (−0.05 ± 0.08 kg;p < .05) and maintained lean mass, while the CHO group lost lean mass (−0.90 ± 0.06 kg; p < .05) and body mass (−2.3 ± 0.7 kg; p < .05). Both groups increased 1RM squat, but the increase in the BCAA group (15.1 ± 2.2 kg; p < .05)was greater (P < 0.05) than the CHO group. The BCAA group increased 1RM bench press (7.1 ± 1.6 kg; P < 0.05), while the CHO group decreased strength (−3.7 ± 2.3 kg; P < 0.05). The only change in muscular endurance was an increase in repetitions to fatigue (5.3 ± 0.2; p < .05) in the CHO group.
Conclusion
These results show that BCAA supplementation in trained individuals performing resistance training while on a hypocaloric diet can maintain lean mass and preserve skeletal muscle performance while losing fat mass.
Wesley David Dudgeon*, Elizabeth Page Kelley and Timothy Paul Scheett
Author Affiliations
Department of Health and Human Performance, College of Charleston, 24 George Street, Charleston 29424, SC, USA
Journal of the International Society of Sports Nutrition 2016, 13:1 doi:10.1186/s12970-015-0112-9
Received: 20 August 2015
Accepted: 17 December 2015
Published: 5 January 2016
Abstract
Background
Athletes and active adults many times have the goal of improving/maintaining fitness while losing weight and this is best achieved by caloric restriction in combination with exercise. However, this poses a risk for lean tissue loss, which can limit performance. Thus, the purpose of this study was to determine the effectiveness of a branched-chain amino acid (BCAA) supplement, in conjunction with heavy resistance training and a carbohydrate caloric-restricted “cut diet” on body composition and muscle fitness.
Methods
Seventeen resistance-trained males (21–28 years of age) were randomized to a BCAA group (n = 9) or a carbohydrate (CHO) group (n = 8) who both received their respective supplement during the 8 weeks of a prescribed body building style resistance training protocol. Subjects were prescribed a hypocaloric diet (based upon pre-intervention analysis) that was to be followed during the study.
Results
The BCAA group lost fat mass (−0.05 ± 0.08 kg;p < .05) and maintained lean mass, while the CHO group lost lean mass (−0.90 ± 0.06 kg; p < .05) and body mass (−2.3 ± 0.7 kg; p < .05). Both groups increased 1RM squat, but the increase in the BCAA group (15.1 ± 2.2 kg; p < .05)was greater (P < 0.05) than the CHO group. The BCAA group increased 1RM bench press (7.1 ± 1.6 kg; P < 0.05), while the CHO group decreased strength (−3.7 ± 2.3 kg; P < 0.05). The only change in muscular endurance was an increase in repetitions to fatigue (5.3 ± 0.2; p < .05) in the CHO group.
Conclusion
These results show that BCAA supplementation in trained individuals performing resistance training while on a hypocaloric diet can maintain lean mass and preserve skeletal muscle performance while losing fat mass.
JISSN | Full text | In a single-blind, matched group design: branched-chain amino acid supplementation and resistance training maintains lean body mass during a caloric restricted diet
