PMID: 11323554Apr 27, 2001Paper

Effect of creatine loading on long-term sprint exercise performance and metabolism

Medicine and Science in Sports and Exercise
David PreenSimon Ching

Abstract

This study examined whether creatine (Cr) supplementation could enhance long-term repeated-sprint exercise performance of approximately 80 min in duration. Fourteen active, but not well-trained, male subjects initially performed 10 sets of either 5 or 6 x 6 s maximal bike sprints, with varying recoveries (24, 54, or 84 s between sprints) over a period of 80 min. Work done (kJ) and peak power (W) were recorded for each sprint, and venous blood was collected preexercise and on four occasions during the exercise challenge. Muscle biopsies (vastus lateralis) were obtained preexercise as well as 0 min and 3 min postexercise. Subjects were then administered either 20 g.d-1 Cr.H2O (N = 7) or placebo (N = 7) for 5 d. Urine samples were collected for each 24 h of the supplementation period. Subjects were then retested using the same procedures as in test 1. Total work done increased significantly (P < 0.05) from 251.7 +/- 18.4 kJ presupplementation to 266.9 +/- 19.3 kJ (6% increase) after Cr ingestion. No change was observed for the placebo group (254.0 +/- 10.4 kJ to 252.3 +/- 9.3 kJ). Work done also improved significantly (P < 0.05) during 6 x 6 s sets with 54-s and 84-s recoveries and approached significance (P = 0.052) in 5 x 6 s se...Continue Reading

Citations

Dec 26, 2002·Canadian Journal of Applied Physiology = Revue Canadienne De Physiologie Appliquée·Peter W R Lemon
Oct 30, 2004·Journal of Sports Sciences·Matt SpencerCarmel Goodman
Aug 5, 2006·Medicine and Science in Sports and Exercise·Matt SpencerRob Duffield
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