| Creatine supplementation and exercise performance: an update. | |
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MedLine Citation:
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PMID: 9627907 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Creatine, a natural nutrient found in animal foods, is alleged to be an effective nutritional ergogenic aid to enhance sport or exercise performance. Research suggests that oral creatine monohydrate supplementation may increase total muscle creatine [TCr], including both free creatine [FCr] and phosphocreatine [PCr]. Some, but not all, studies suggest that creatine supplementation may enhance performance in high-intensity, short-term exercise tasks that are dependent primarily on PCr (i.e., < 30 seconds), particularly laboratory tests involving repeated exercise bouts with limited recovery time between repetitions; additional corroborative research is needed regarding its ergogenic potential in actual field exercise performance tasks dependent on PCr. Creatine supplementation has not consistently been shown to enhance performance in exercise tasks dependent on anaerobic glycolysis, but additional laboratory and field research is merited. Additionally, creatine supplementation has not been shown to enhance performance in exercise tasks dependent on aerobic glycolysis, but additional research is warranted, particularly on the effect of chronic supplementation as an aid to training for improvement in competitive performance. Short-term creatine supplementation appears to increase body mass in males, although the initial increase is most likely water. Chronic creatine supplementation, in conjunction with physical training involving resistance exercise, may increase lean body mass. However, confirmatory research data are needed. Creatine supplementation up to 8 weeks has not been associated with major health risks, but the safety of more prolonged creatine supplementation has not been established. Creatine is currently legal and its use by athletes is not construed as doping. |
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Authors:
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M H Williams; J D Branch |
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Publication Detail:
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Type: Journal Article; Review |
Journal Detail:
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Title: Journal of the American College of Nutrition Volume: 17 ISSN: 0731-5724 ISO Abbreviation: J Am Coll Nutr Publication Date: 1998 Jun |
Date Detail:
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Created Date: 1998-08-28 Completed Date: 1998-08-28 Revised Date: 2008-06-23 |
Medline Journal Info:
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Nlm Unique ID: 8215879 Medline TA: J Am Coll Nutr Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 216-34 Citation Subset: IM; S |
Affiliation:
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Department of Exercise Science, Physical Education, and Recreation, Old Dominion University, Norfolk, Virginia 23529-0196, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adenosine Triphosphate
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metabolism Creatine / administration & dosage*, metabolism Dietary Supplements* Energy Metabolism Exercise / physiology* Humans Lactic Acid / metabolism Muscle, Skeletal / metabolism Phosphocreatine / metabolism Physical Endurance Sports |
| Chemical | |
Reg. No./Substance:
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50-21-5/Lactic Acid; 56-65-5/Adenosine Triphosphate; 57-00-1/Creatine; 67-07-2/Phosphocreatine |
| Comments/Corrections | |
Comment In:
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J Am Coll Nutr. 1998 Jun;17(3):205-6
[PMID:
9627905
]
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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