BACKGROUND: Athletes and active adults many times have the goal of improving/maintaining @entity410 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 @entity3689 (BCAA) supplement, in conjunction with heavy resistance training and a @entity1735 caloric-restricted "cut diet" on body composition and @entity121 . METHODS: Seventeen resistance-trained males (21-28  years of age) were randomized to a BCAA group (n   =   9) or a @entity1735 ( @entity435 ) 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 @entity435 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 @entity435 group. The BCAA group increased 1RM bench press (7.1        1.6  kg; P   <   0.05), while the @entity435 group decreased strength (-3.7        2.3  kg; P   <   0.05). The only change in muscular endurance was an increase in repetitions to @entity1295 (5.3        0.2; p   <   .05) in the @entity435 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.

In a single-blind, matched group design: branched-chain XXXX supplementation and resistance training maintains lean body mass during a caloric restricted diet.

@entity410 :: ('MESH:D012640', 'Disease') :: ['fitness'] @entity1295 :: ('MESH:D005221', 'Disease') :: ['fatigue'] @entity1735 :: ('CHEBI:16646', 'Chemical') :: ['carbohydrate'] @entity435 :: ('CHEBI:42485', 'Chemical') :: ['CHO'] @entity3689 :: ('D000596', 'Chemical') :: ['amino acid'] @entity121 :: ('MESH:D009135', 'Disease') :: ['muscle fitness']
@entity3689 :: (D000596,Chemical) :: ['amino acid']
