title: Branched-chain aminoacid supplementation attenuates a decrease in power-producing ability following acute strength training.
abstract: BACKGROUND
  This study aimed to investigate the effects of branched-chain amino acid (BCAA) supplementation on recovery of power-producing ability following a strength training (ST) session.
  
  
  METHODS
  Eleven resistance-trained males, performed baseline measures of a countermovement jump (CMJ) and a seated shot-put throw (SSPT). In a counterbalanced fashion, participants were provided with either 20-g of BCAA or a placebo. Each dose was divided into two equal quantities and consumed before and after a ST session consisting of various multi-joint barbell exercises. For both conditions, the CMJ and SSPT were repeated at 24-h post-ST, in addition participants attributed their perceived muscle soreness level via a 200-mm visual analogue scale.
  
  
  RESULTS
  Following ST there were significant decrements in CMJ (baseline; 55.2±7.4-cm, BCAA; 52.8±5.9-cm placebo; 50.6±7.3-cm) and SSPT (baseline; 4.55±0.56-m, BCAA; 4.37±0.61-m, placebo; 4.22±0.64-m) for both conditions in comparison to baseline values (P<0.05). However, BCAA was shown to attenuate the decrements in CMJ and SSPT performance compared to placebo (P<0.05). Muscle soreness was significantly increased following ST for both conditions, however there were no differences in attributed values following BCAA and placebo ingestion.
  
  
  CONCLUSIONS
  BCAA administered acutely before and following intensive ST attenuates a decrease in power-producing ability experienced by resistance-trained males. The apparent small but significant effects on functional power suggest that BCAA is an effective ergogenic aid for athletes who require augmented recovery of power-producing ability following intensive ST.
authors: School of Sport and Exercise Science, University of Lincoln, Lincoln, UK - tgee@lincoln.ac.uk.
authors: Thomas I
authors: TI
authors: Gee
authors: School of Sport and Exercise Science, University of Lincoln, Lincoln, UK.
authors: Stefan
authors: S
authors: Deniel
mesh_terms: D000222:Adaptation, Physiological / Q000187:drug effects; D000597:Amino Acids, Branched-Chain / Q000627:therapeutic use*; D056352:Athletes; D054874:Athletic Performance / Q000502:physiology; D019587:Dietary Supplements; D017079:Exercise Tolerance / Q000187:drug effects / Q000502:physiology; D006801:Humans; D007249:Inflammation / Q000178:diet therapy; D008297:Male; D018763:Muscle Fatigue / Q000187:drug effects*; D018482:Muscle, Skeletal / Q000187:drug effects* / Q000502:physiology*; D063806:Myalgia / Q000178:diet therapy*; D010147:Pain Measurement; D059385:Plyometric Exercise; D055070:Resistance Training; D055815:Young Adult
chemical_list: D000597:Amino Acids, Branched-Chain