| Decreased activation in the primary motor cortex area during middle-intensity hand grip exercise to exhaustion in athlete and nonathlete participants. | |
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MedLine Citation:
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PMID: 21058582 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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It remains unclear whether activation kinetics in the motor cortex area is affected by training. The purpose of the present study was to examine the effect of training on the motor cortex activation. To accomplish this, the correlation between maximal voluntary contraction and motor cortex (M1) activity was examined. Differences in the motor cortex activation between two groups during exercise were examined in 14 male volunteer participants (M age 25.2 yr., SD = 1.4): seven highly trained athletes (VO2max = 60 ml/kg/min.; maximal voluntary contraction > 55 kg, M MVC = 63.6 kg, SD = 4.2) and seven nonathletes (VO2max < 45 ml/ kg/min.; MVC < 50.0 kg, M MVC = 4 3.5 kg, SD = 5.2). Participants were familiarized with the study protocol during which they performed a maximal voluntary static handgrip test. Specifically, M1 activation was measured by near-infrared spectroscopy throughout a handgrip exercise in which participants performed a sustained middle-intensity handgrip exercise (50% of maximal voluntary contraction) until voluntary exhaustion. In the Athlete group, activation in the M1 at voluntary exhaustion fell below the resting value. In the Nonathlete group, activation in the M1 was elevated throughout the exercise. Results suggest that motor signals from the motor cortex area correlate with exercise training status, especially during fatiguing exercise. |
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Authors:
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Kenichi Shibuya; Naomi Kuboyama |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Perceptual and motor skills Volume: 111 ISSN: 0031-5125 ISO Abbreviation: Percept Mot Skills Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-11-09 Completed Date: 2010-11-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401131 Medline TA: Percept Mot Skills Country: United States |
Other Details:
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Languages: eng Pagination: 19-30 Citation Subset: IM |
Affiliation:
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Center for General Education, Nagasaki Institute of Applied Science, Nagasaki, Japan. shibuya_kenichi@nias.ac.jp |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Athletes* Athletic Performance / physiology* Dominance, Cerebral / physiology Electroencephalography Hand Strength / physiology* Humans Male Motor Cortex / physiology* Muscle Fatigue / physiology* Oxygen Consumption / physiology Oxyhemoglobins / metabolism Physical Education and Training* Physical Fitness / physiology* Reference Values Spectroscopy, Near-Infrared Young Adult |
| Chemical | |
Reg. No./Substance:
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0/Oxyhemoglobins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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