Rossiter, Cannell and Jakeman (1996) The effect of oral creatine supplementation on the 1000-m performance of competitive rowers

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The effect of oral creatine supplementation on the 1000-m performance of competitive rowers

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CONTRIBUTORS:

	Author:	Rossiter, H. B.
	Author:	Cannell, E. R.
	Author:	Jakeman, P. M.

JOURNAL:

Journal of Sports Sciences (JSS), 14(2), ?? - ??.

YEAR:

1996

PUB TYPE:

Journal Article

SUBJECT(S):

ROWING; ATHLETE; MAN; WOMAN; DIETARY-SUPPLEMENTATION; CREATINE

DISCIPLINE:

No discipline assigned

HTTP:

LANGUAGE:

English

PUB ID:

103-366-522 (Last edited on 2002/02/27 18:45:00 US/Mountain)

SPONSOR(S):

ABSTRACT:
This study investigated the change in 1000-m simulated rowing performance in two matched groups of 19 competitive rowers following a 5-day period of supplementation with placebo (CON group) or creatine at a dose equivalent to 0.25 g creatine monohydrate per kilogram of body mass (BM) (EXP group). Creatine uptake was calculated from the difference between the amount fed and the amount recovered in urine during each 24-h period of supplementation. Total creatine uptake for the EXP group over the 5-day period of supplementation averaged 34.9 plus/minus 10.9 g (range 20.1 - 54.9 g), which equated to 3.54 plus/minus 0.93 mmol kg BM-1. The estimated creatine uptake into muscle was 38.1 plus/minus 10.0 (range 22.6 - 56.6) mmol kg dry weight-1 for these subjects. After supplementation with placebo, the CON group showed no change in 1000-m rowing performance (214.0 plus/minus 30.9 vs 214.1 plus/minus 31.5 s; P = 0.88). By contrast, 16 of the 19 subjects in the EXP group improved their performance times. The mean improvement in rowing performance for the EXP group was 2.3 s (211.0 plus/minus 21.5 vs 208.7 plus/minus 21.8 s; P is less than 0.001), an overall improvement of just over 1 percent (range - 0.4 to 3.4 percent). We conclude that in competitive rowers, a 5-day period of creatine supplementation was effective in raising whole-body creatine stores, the magnitude of which provided a positive, though statistically non-significant (r - 0.426, P = 0.088), relationship with 1000-m rowing performance.

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