| Effect of active warm-up on metabolism prior to and during intense dynamic exercise. | |
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MedLine Citation:
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PMID: 12471321 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: This study investigated whether active warm-up (AW) would increase muscle acetylcarnitine concentration before exercise, thereby reducing the reliance on nonoxidative ATP production during subsequent high-intensity exercise. METHODS: Six female subjects performed a 30-s sprint at 120% of their maximal power output on an electronically braked cycle ergometer 5 min after undertaking an active warm-up. To exclude any effect of muscle temperature (Tm) on metabolism, AW was compared with control (C), which involved passively heating the muscle to the same temperature as that achieved by active warm-up (37.1 +/- 0.3 vs 37.2 +/- 0.2 degrees C AW and C, respectively). RESULTS: Active warm-up significantly increased the concentration of acetylcarnitine from 4.5 +/- 1.5 mmol x kg(-1) dry muscle (dm)(-1) at rest to 9.4 +/- 1.6 mmol x kg dm(-1) before the onset of exercise. There was no change in acetylcarnitine concentration in C. During exercise the accumulation of muscle lactate was significantly less in AW compared with C (21.9 +/- 3.8 vs 34.3 +/- 2.3 mmol.kg dm, respectively). CONCLUSION: The main finding of this study was that there was less accumulation of blood and muscle lactate during intense dynamic exercise preceded by active warm-up, which could not be accounted for by a difference in T between trials immediately before the onset of exercise(m) |
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Authors:
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Susan C Gray; Giuseppe Devito; Myra A Nimmo |
Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: 34 ISSN: 0195-9131 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 2002 Dec |
Date Detail:
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Created Date: 2002-12-09 Completed Date: 2003-03-28 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: United States |
Other Details:
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Languages: eng Pagination: 2091-6 Citation Subset: IM; S |
Affiliation:
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Strathclyde Institute for Biomedical Sciences, University of Strathclyde, Glasgow, United Kingdom. s.gray@napier.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acetylcarnitine
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metabolism Adenosine Triphosphate / metabolism Analysis of Variance Biological Markers / blood Body Temperature / physiology Catecholamines / blood Creatinine / metabolism Energy Metabolism / physiology* Exercise / physiology* Female Heart Rate / physiology Humans Lactates / blood Muscle, Skeletal / metabolism Nootropic Agents / metabolism Oxygen Consumption / physiology Reference Values Rest / physiology Women's Health |
| Chemical | |
Reg. No./Substance:
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0/Biological Markers; 0/Catecholamines; 0/Lactates; 0/Nootropic Agents; 14992-62-2/Acetylcarnitine; 56-65-5/Adenosine Triphosphate; 60-27-5/Creatinine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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