The effect of oral creatine supplementation on the 1000-m performance of competitive rowers
Deutscher übersetzter Titel: | Auswirkung oraler Kreatinsupplementierung auf die 1000m-Leistung von Ruderleistungssportlern |
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Autor: | Rossiter, Harry B.; Cannell, Emma R.; Jakeman, Philip M. |
Erschienen in: | Journal of sports sciences |
Veröffentlicht: | 14 (1996), 2, S. 175-179, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 0264-0414, 1466-447X |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU199605107921 |
Quelle: | BISp |
Abstract des Autors
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+/-10.9 g (range 20.1-54.9 g), which equated to 3.54+/-0.93 mmol/kg BM. The estimated creatine uptake into muscle was 38.1+/-10.0 (range 22.6-56.6) mmol/kg dry weight for these subjects. After supplementation with placebo, the CON group showed no change in 1000-m rowing performance (214.0+/-30.9 vs 214.1+/-31.5 s; P=0.88). Of these subjects, 7 decreased and 10 increased their performance times (range -3.1 to 2.7%). 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+/-21.5 vs 208.7+/-21.8 s; P<0.001), an overall improvement of just over 1% (range - 0.4 to 3.4%). 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. Verf.-Referat