Creatine supplementation???Part I: performance, clinical chemistry, and muscle volume
- 1 December 1999
- journal article
- clinical trial
- Published by Ovid Technologies (Wolters Kluwer Health) in Medicine & Science in Sports & Exercise
- Vol. 31 (12), 1763-9
- https://doi.org/10.1097/00005768-199912000-00011
Abstract
KAMBER, M., M. KOSTER, R. KREIS, G. WALKER, C. BOESCH, and H. HOPPELER. Creatine supplementation—Part I: performance, clinical chemistry, and muscle volume. Med. Sci. Sports Exerc., Vol. 31, No. 12, pp. 1763–1769, 1999. Our purpose was to study the effects and side effects of creatine (Cr) supplementation on high-intensity, short-term muscle work, on biochemical parameters related to Cr metabolism in blood and urine, and on muscle volume of the lower limb muscles. A cycling ergometer was used in a double-blind, cross-over study on 10 well-trained male physical education students to measure physical performance with 10 repetitive ergometer sprints (6-s duration, 30-s rest) before and after supplementation (5 d, 20 g·d−1, washout period 61 ± 8 d, mean ± SEM, minimum 28 d) with Cr or placebo. Before and after supplementation, blood and urine were taken and the muscle volume of the lower limb was determined by magnetic resonance imaging (MRI). A significant (P ≪ 0.05) increase in performance (+ 7%) at the end [4–6 s] of the later sprints (4–7 and 8–10) was observed combined with a lower production of blood lactate (−1 mmol·L−1) with Cr supplementation. The concentration of Cr was increased significantly in urine (P P Cr supplementation is effective in improving short-term performance, and the methods used show no detrimental side effects with this supplementation protocol.Keywords
This publication has 31 references indexed in Scilit:
- The Influence of Recovery Duration on High-Intensity Exercise Performance After Oral Creatine SupplementationCanadian Journal of Applied Physiology, 1997
- Effect of Oral Creatine Supplementation on Single-Effort Sprint Performance in Elite SwimmersInternational Journal of Sport Nutrition, 1996
- Skeletal muscle metabolism during short duration high‐intensity exercise: influence of creatine supplementationActa Physiologica Scandinavica, 1995
- The effect of creatine monohydrate ingestion on anaerobic power indices, muscular strength and body compositionActa Physiologica Scandinavica, 1995
- Effect of oral creatine supplementation on power output and fatigue during bicycle ergometryJournal of Applied Physiology, 1995
- Creatine in Humans with Special Reference to Creatine SupplementationSports Medicine, 1994
- The influence of dietary creatine supplementation on performance during repeated bouts of maximal isokinetic cycling in manEuropean Journal of Applied Physiology, 1994
- Creatine supplementation and dynamic high‐intensity intermittent exerciseScandinavian Journal of Medicine & Science in Sports, 1993
- Enzymatic determination of red cell creatine as an index of hemolysisClinical Biochemistry, 1987
- The Wingate Anaerobic TestSports Medicine, 1987