The effects of high-dose glutamine ingestion on weightlifting performance.
The purpose of this study was to determine if high-dose glutamine ingestion affected weightlifting performance. In a double-blind, placebo-controlled, crossover study, 6 resistance-trained men (mean +/- SE: age, 21.5 +/- 0.3 years; weight, 76.5 +/- 2.8 kg(-1)) performed weightlifting exercises after the ingestion of glutamine or glycine (0.3 g x kg(-1)) mixed with calorie-free fruit juice or placebo (calorie-free fruit juice only). Each subject underwent each of the 3 treatments in a randomized order. One hour after ingestion, subjects performed 4 total sets of exercise to momentary muscular failure (2 sets of leg presses at 200% of body weight, 2 sets of bench presses at 100% of body weight). There were no differences in the average number of maximal repetitions performed in the leg press or bench press exercises among the 3 groups. These data indicate that the short-term ingestion of glutamine does not enhance weightlifting performance in resistance-trained men.
Antonio
Jose
J
Sports Science Laboratory, University of Delaware, Newark, Delaware 19716, USA.
Sanders
Michael S
MS
Kalman
Douglas
D
Woodgate
Derek
D
Street
Chris
C
D000328:Adult; D001132:Arm / Q000502:physiology; D018592:Cross-Over Studies; D019587:Dietary Supplements; D004311:Double-Blind Method; D015444:Exercise / Q000502:physiology*; D005973:Glutamine / Q000008:administration & dosage*; D006801:Humans; D007866:Leg / Q000502:physiology; D008297:Male; D018482:Muscle, Skeletal / Q000187:drug effects*; D013647:Task Performance and Analysis; D014891:Weight Lifting / Q000502:physiology*
D005973:Glutamine