| A light load eccentric exercise confers protection against a subsequent bout of more demanding eccentric exercise. | |
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MedLine Citation:
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PMID: 17707693 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study investigated the hypothesis that a light eccentric exercise (ECC) that does not induce a loss of muscle function and delayed onset muscle soreness would confer a protective effect against a more strenuous ECC. Eighteen young men were randomly placed into two groups: 10-40% (n=9) and 40% (n=9). Subjects in the 10-40% group performed ECC of the elbow flexors (six sets of five reps) using a dumbbell set at 10% of maximal isometric strength (MVC) at an elbow joint angle of 90 degrees , followed 2 days later by ECC using a dumbbell weight of 40% MVC. Subjects in the 40% group performed the 40% ECC only. Changes in MVC, range of motion (ROM), upper arm circumference (CIR), plasma creatine kinase (CK) activity and muscle soreness before, immediately after, 1-5 and 7 days following the 40% ECC were compared between groups by a two-way repeated measures ANOVA. No significant changes in any of the criterion measures were found immediately and 1-2 days after the 10% ECC. Following the 40% ECC, the 10-40% group showed significantly (P<0.05) smaller decreases in MVC and ROM, and smaller increases in muscle soreness compared with the 40% group, but no significant differences between groups were evident for CIR and plasma CK activity. These results suggest that the 10% ECC induced some protection against a subsequent bout of 40% ECC performed 2 days later. It appears that the light eccentric exercise preconditioned the muscles for exposure to the subsequent damaging eccentric exercise bout. |
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Authors:
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Andrew P Lavender; Kazunori Nosaka |
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Publication Detail:
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Type: Journal Article Date: 2007-08-17 |
Journal Detail:
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Title: Journal of science and medicine in sport / Sports Medicine Australia Volume: 11 ISSN: 1440-2440 ISO Abbreviation: J Sci Med Sport Publication Date: 2008 Jun |
Date Detail:
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Created Date: 2008-04-28 Completed Date: 2008-10-21 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9812598 Medline TA: J Sci Med Sport Country: Australia |
Other Details:
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Languages: eng Pagination: 291-8 Citation Subset: IM |
Affiliation:
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Graduate School of Integrated Science, Yokohama City University, Yokohama, Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Athletic Injuries / physiopathology, prevention & control* Exercise / physiology Humans Male Muscle, Skeletal / injuries*, physiopathology Physical Education and Training / methods* Physical Endurance / physiology* Upper Extremity / injuries, physiology Weight Lifting / physiology* |
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