The purpose of this study was to determine the effects of oral creatine supplementation
on high intensity, intermittent exercise performance in competitive squash players.
Nine squash players (mean ± SEM V˙O2max = 61.9 ± 2.1ml · kg-1 · min-1; body mass = 73 ± 3 kg) performed an on-court “ghosting” routine that involved 10
sets of 2 repetitions of simulated positional play, each set interspersed with 30
s passive recovery. A double blind, crossover design was utilised whereby experimental
and control groups supplemented 4 times daily for 5 d with 0.075 g · kg-1 body mass of creatine monohydrate and maltodextrine, respectively, and a 4 wk washout
period separated the crossover of treatments. The experimental group improved mean
set sprint time by 3.2 ± 0.8 % over and above the changes noted for the control group
(P = 0.004 and 95 % Cl = 1.4 to 5.1 %). Sets 2 to 10 were completed in a significantly
shorter time following creatine supplementation compared to the placebo condition
(P < 0.05). In conclusion, these data support existing evidence that creatine supplementation
improves high intensity, intermittent exercise performance. In addition, the present
study provides new evidence that oral creatine supplementation improves exercise performance
in competitive squash players.
Phosphocreatine, ergogenic aid, repetitive sprint, ghosting.
