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|Title:||A light load eccentric exercise confers protection against a subsequent bout of more demanding eccentric exercise|
|Author:||Lavender, Andrew Philip|
|Citation:||Journal of Science and Mediecine in Sport, 2008; 11 (3):291-298|
|Publisher:||Sports Medicine Australia|
|School/Discipline:||School of Molecular and Biomedical Science|
|Andrew P. Lavender and Kazunori Nosaka|
|Abstract:||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.|
|Description:||Copyright © 2007 Sports Medicine Australia Published by Elsevier Ltd|
|Provenance:||Available online 17 August 2007.|
|Appears in Collections:||Molecular and Biomedical Science publications|
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