Effect of Explosive Resistance Training on Titin and Myosin Heavy Chain Isoforms in Trained Subjects
- Publication Type:
- Journal Article
- Citation:
- Journal of Strength and Conditioning Research, 2003, 17 (4), pp. 645 - 651
- Issue Date:
- 2003-11-01
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| Filename | Description | Size | |||
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The purpose of this investigation was to evaluate changes in myosin heavy chain (MyHC) and titin isoforms after using various loads during explosive jump squat training. Twenty-four male athletic subjects were recruited for this study. Two experimental groups performed 8-weeks of jump squats using either 30% (n = 9) or 80% (n = 9) of their previously determined 1 repetition maximum. A third group served as controls (n = 6). Muscle biopsies were obtained before and after 8 weeks from vastus lateralis. The analysis of titin within these subjects confirmed that human skeletal muscle contains 2 isoforms of titin. There was no significant group X time interaction for MyHC or titin isoform expression. The data from this investigation indicates that a relatively short period of explosive resistance training results in negligible changes in the expression of MyHC or titin isoforms.
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