A double-blind, placebo-controlled trial of 31 people ranging from 18 to 24 years of age evaluated the potential benefits of glutamine as a sports supplement for improving response to resistance training (weight lifting).35 Participants received either placebo or glutamine at a dose of 0.9 g per kg of lean tissue mass. After 6 weeks of resistance training, participants taking glutamine showed no relative improvement in performance, composition, or muscle protein degradation.
Similarly, negative results were seen in a small double-blind, placebo-controlled trial of weightlifters using a dose of 0.3 g per kg of total body weight.36
35. Candow DG, Chilibeck PD, Burke DG, et al. Effect of glutamine supplementation combined with resistance training in young adults. Eur J Appl Physiol. 2001;86:142–149.
36. Antonio J, Sanders MS, Kalman D, et al. The effects of high-dose glutamine ingestion on weightlifting performance. J Strength Cond Res. 2002;16:157–160.