Skip Navigation LinksHome > May 1999 - Volume 13 - Issue 2 > The Effects of 6 Weeks of Creatine Monohydrate Supplementati...
Journal of Strength & Conditioning Research:
Original Article: PDF Only

The Effects of 6 Weeks of Creatine Monohydrate Supplementation on Performance Measures and Body Composition in Collegiate Track and Field Athletes.

KIRKSEY, BRETT; STONE, MICHAEL H.; WARREN, BEVERLY J.; JOHNSON, ROBERT L.; STONE, MEG; HAFF, G. GREGORY; WILLIAMS, FRANKLIN E.; PROULX, CHRISTOPHER

Collapse Box

Abstract

Thirty-six (16 men, 20 women) collegiate track and field athletes (sprinter, jumpers, and throwers) were randomly divided into a placebo (P, n = 21) group and a creatine supplemented (C, n = 15) group. Six weeks of supplementation consisted of 0.30 g?kg-1?d-1 of creatine monohydrate (Crm) or a placebo. Subjects were involved in a preseason conditioning program that consisted of interval sprinting and multijoint, large-muscle-group weight-training movements programmed in a periodized manner. Pretesting (PRE) and posttesting (POS) consisted of a 7-site skinfold analysis, hydrostatic weighing, countermovement vertical jump, static vertical jump, and 5 +/- 10-second maximum cycle ergometer rides. Data were analyzed using G T analysis of variance. Significant interactions occurred for several variables. Creatine effected superior gains (percent change creatine vs. placebo) in countermovement vertical jump height (7.0 vs. 2.3%), countermovement vertical jump power index (6.8 vs. 3.1%), average cycle peak power (12.8 vs. 4.8%), cycle average power (10.8 vs. 3.1%), cycle total work (10.8 vs. 3.5%), cycle initial rate of power production (30.0 vs. 11.2%), and lean body mass. These results suggest that 6 weeks of Crm intake can favorably enhance vertical jump, power output, work capacity, and lean body mass in men and women collegiate track and field athletes following a periodized training program.

(C) 1999 National Strength and Conditioning Association

 

Login

Article Tools

Share

Search for Similar Articles
You may search for similar articles that contain these same keywords or you may modify the keyword list to augment your search.