Effects of creatine monohydrate supplementation on simulated soccer performance
Williams, Jeremy; Abt, Grant; Kilding, Andrew E.
Dr Grant Abt G.Abt@hull.ac.uk
Reader in Sport and Exercise Physiology and Head of Department for Sport, Health and Exercise Science
Andrew E. Kilding
Purpose: To determine the effects of acute short-term creatine (Cr) supplementation on physical performance during a 90-min soccer-specific performance test. Methods: A double-blind, placebo-controlled experimental design was adopted during which 16 male amateur soccer players were required to consume 20 g/d Cr for 7 d or a placebo. A Ball-Sport Endurance and Speed Test (BEAST) comprising measures of aerobic (circuit time), speed (12- and 20-m sprint), and explosive-power (vertical jump) abilities performed over 90 min was performed presupplementation and postsupplementation. Results: Performance measures during the BEAST deteriorated during the second half relative to the first for both Cr (1.2–2.3%) and placebo (1.0–2.2%) groups, indicating a fatigue effect associated with the BEAST. However, no significant differences existed between groups, suggesting that Cr had no performance-enhancing effect or ability to offset fatigue. When effect sizes were considered, some measures (12-m sprint, –0.53 ± 0.69; 20-m sprint, –0.39 ± 0.59) showed a negative tendency, indicating chances of harm were greater than chances of benefit. Conclusions: Acute short-term Cr supplementation has no beneficial effect on physical measures obtained during a 90-min soccer-simulation test, thus bringing into question its potential as an effective ergogenic aid for soccer players.
|Journal||International journal of sports physiology & performance|
|Peer Reviewed||Peer Reviewed|
|APA6 Citation||Williams, J., Abt, G., & Kilding, A. E. (2014). Effects of creatine monohydrate supplementation on simulated soccer performance. International journal of sports physiology and performance : IJSPP, 9(3), 503-510 . https://doi.org/10.1123/IJSPP.2013-0407|
|Keywords||Intermittent, Nutrition, Ergogenic, Team sport, Football|
|Additional Information||Author's accepted manuscript of article published in: International journal of sports physiology & performance, 2014, v.9, issue 3, as accepted for publication.|
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