Acute L-glutamine Ingestion Does Not Improve Maximal Effort Exercise
Document Type
Article
Publication Date
9-1-1998
Department
Human Performance and Recreation
Abstract
Background. L-glutamine (GLN) may have an ergogenic effect during exercise considering its base generating potential, We attempted to determine whether GLN ingestion influences acid-base balance and improves high intensity exercise performance, Method. Ten trained males performed five exercise bouts on a cycle ergometer at 100% of (V) over dotO(2)peak. The first four bouts were 60 sec in duration, while the fifth bout was continued to fatigue. Each bout was separated by 60 sec of recovery. The exercise bouts were initiated 90 min after ingesting 0.03 g.kg body mass(-1) of either GLN or placebo (PLC). Venous blood samples were collected pre-ingestion (PRE-IN), pre-exercise (PRE-ES), and following bouts four (B4) and five (B5) and analyzed for pH, bicarbonate concentration (HCO3), and lactate concentration (La-). Time to fatigue for B5 was used as a performance measure. Results. pH, [HCO3], and [La-] were not significantly different (p>0.05) between conditions for PRE-IN, PRE-EX, B4, and B5. Time to fatigue was not significantly different between conditions and averaged 263.4+/-24.5 sec and 263.2+/-19.4 sec for the GLN and PLC trials, respectively, Conclusions. These data indicate that acute ingestion of L-glutamine does not enhance either buffering potential or high intensity exercise performance in trained males.
Publication Title
Journal of Sports Medicine and Physical Fitness
Volume
38
Issue
3
First Page
240
Last Page
244
Recommended Citation
Haub, M.,
Potteiger, J.,
Nau, K.,
Webster, M. J.
(1998). Acute L-glutamine Ingestion Does Not Improve Maximal Effort Exercise. Journal of Sports Medicine and Physical Fitness, 38(3), 240-244.
Available at: https://aquila.usm.edu/fac_pubs/5112