Effect of creatine supplementation on sprint exercise performance and muscle metabolism

Snow, R.J., McKenna, M. J., Selig, S. E., Kemp, J., Stathis, C. G. and Zhao, S. 1998, Effect of creatine supplementation on sprint exercise performance and muscle metabolism, Journal of applied physiology, vol. 84, no. 5, pp. 1667-1673.

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Title Effect of creatine supplementation on sprint exercise performance and muscle metabolism
Author(s) Snow, R.J.
McKenna, M. J.
Selig, S. E.
Kemp, J.
Stathis, C. G.
Zhao, S.
Journal name Journal of applied physiology
Volume number 84
Issue number 5
Start page 1667
End page 1673
Publisher American Physiological Society
Place of publication [Bethesda, Md.]
Publication date 1998-05-01
ISSN 8750-7587
1522-1601
Keyword(s) adenine nucleotides
creatine loading
ergogenic aid
anaerobic energy metabolism
recovery
Summary The aim of the present study was to examine the effect of creatine supplementation (CrS) on sprint exercise performance and skeletal muscle anaerobic metabolism during and after sprint exercise. Eight active, untrained men performed a 20-s maximal sprint on an air-braked cycle ergometer after 5 days of CrS [30 g creatine (Cr) + 30 g dextrose per day] or placebo (30 g dextrose per day). The trials were separated by 4 wk, and a double-blind crossover design was used. Muscle and blood samples were obtained at rest, immediately after exercise, and after 2 min of passive recovery. CrS increased the muscle total Cr content (9.5 ± 2.0%, P < 0.05, mean ± SE); however, 20-s sprint performance was not improved by CrS. Similarly, the magnitude of the degradation or accumulation of muscle (e.g., adenine nucleotides, phosphocreatine, inosine 5′-monophosphate, lactate, and glycogen) and plasma metabolites (e.g., lactate, hypoxanthine, and ammonia/ammonium) were also unaffected by CrS during exercise or recovery. These data demonstrated that CrS increased muscle total Cr content, but the increase did not induce an improved sprint exercise performance or alterations in anaerobic muscle metabolism.
Language eng
Field of Research 119999 Medical and Health Sciences not elsewhere classified
Socio Economic Objective 970111 Expanding Knowledge in the Medical and Health Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©1998, American Physiological Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30033444

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