| The study was designed to investigate the effect of creatine
monohydrate ingestion (20 g daily for 5 days) on performance in 45 s
maximal continuous jumping and in all-out treadmill running at 20 km
x h(-1), (inclination 5 degrees, duration approximately 60s). The
participants were qualified sprinters and jumpers. The effect of
creatine was compared with placebo in a double-blind design. Creatine
(Cr) supplementation led to a significant enhancement of performance
capacity in the jumping test by 7% during the first 15 s and by 12%
during the second 15 s of the exercise. The positive effect of Cr
supplementation was not observed in the last third of the continuous
jumping exercise, when the contribution of anaerobic metabolism was
decreasing. The time of intensive running up to exhaustion improved
by 13%. The results show that Cr supplementation helps to prolong the
time during which the maximal rate of power output could be
maintained.
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