The effects of creatine supplementation on performance and hormonal response in amateur swimmers |
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| Authors: | D. Sheikholeslami Vatani H. Faraji R. Soori M. Mogharnasi |
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| Affiliation: | aDepartment of physical education and sport sciences, University of Kurdistan, Sanandaj, Iran;bDepartment of Physical Education & Sport Science, Azad University Branch of Marivan, Marivan, Iran;cDepartment of physical education and sport sciences, University of Tehran, Tehran, Iran;dDepartment of physical education and sport sciences, University of Sistan & Baluchestan, Zahedan, Iran |
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| Abstract: | ObjectivesThe purpose of this study was to determine the influence of short-term creatine supplementation on sprint swimming performance (50 and 100 m) and hormonal responses (growth hormone, testosterone and cortisol).MethodsTwenty amateur male swimmers ingested creatine monohydrate (CR) or a matched placebo (PL) for 6 days. All subjects performed 6 days, swimming exercise. The subjects were tested for performance and hormonal responses the day before and after this creatine loading.ResultsThe mean swimming time of CR group in 50 m was significantly decreased (Before-period: 53.1 ± 3.73 s, after-period: 50.7 ± 2.84 s). Growth hormone and cortisol were not affected by this creatine loading. But, testosterone concentration was significantly greater in CR compared to PL after supplementation period (P < 0.05).ConclusionsOur data suggest that short-term creatine supplementation has improved 50 m sprint performance in amateur swimmer and it seems unlikely creatine loading is hormonally mediated. |
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| Keywords: | Swimmers Creatine supplementation Anabolic hormones |
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