Effect of two maximal isometric contractions on eccentric exercise-induced muscle damage of the elbow flexors

文化大學機構典藏 CCUR > 體育運動健康學院 > 運動教練研究所 > 期刊論文 > Item 987654321/26790

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://irlib.pccu.edu.tw/handle/987654321/26790

题名:	Effect of two maximal isometric contractions on eccentric exercise-induced muscle damage of the elbow flexors
作者:	Chen, TC (Chen, Trevor C.) Chen, HL (Chen, Hsin-Lian) Lin, MJ (Lin, Ming-Ju)[ Chen, CH (Chen, Che-Hsiu) Pearce, AJ (Pearce, Alan J.) Nosaka, K (Nosaka, Kazunori)
贡献者:	Grad Inst Sports Coaching
关键词:	Repeated bout effect Delayed onset muscle soreness Creatine kinase Preconditioning Muscle strength
日期:	2013-06
上传时间:	2014-02-26 15:28:50 (UTC+8)
摘要:	This study investigated the time wise protective effect conferred by two maximal voluntary isometric contractions (2MVCs) at 20A degrees elbow flexion on muscle damage induced by 30 maximal isokinetic (60A degrees s(-1)) eccentric contractions of the elbow flexors (MaxECC). Sixty-five young untrained men were randomly assigned to a control group that did not perform 2MVCs, or one of four experimental groups (n = 13 per group) who performed 2MVCs either immediately (0d), 2 (2d), 4 (4d) or 7 days (7d) before MaxECC. Changes in maximal isokinetic (60A degrees s(-1)) concentric torque (MVC-CON), optimum angle (OA), range of motion, upper arm circumference, muscle soreness, plasma creatine kinase activity and myoglobin concentration, and ultrasound echo-intensity following MaxECC were compared among the groups by a two-way repeated measures ANOVA. No significant changes in any variables were evident following 2MVCs. The 2d and 4d groups showed 16-62 % smaller (P < 0.05) changes in all variables following MaxECC than the control, 0d and 7d groups. The 2d group showed 14-34 % smaller (P < 0.05) changes in all variables except for OA compared with the 4d group. The changes in the variables were similar among the control, 0d and 7d groups. These results show that 2MVCs that were performed between 2 and 4 days before MaxECC attenuated the magnitude of muscle damage, but no such effect was evident if the 2MVCs were performed immediately or 7 days before MaxECC. It is concluded that the protective effect conferred by 2MVCs is relatively short-lived, and there is a window for the effect to be conferred.
關聯:	EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY Volume: 113 Issue: 6 Pages: 1545-1554
显示于类别:	[運動教練研究所] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	557	检视/开启

检视Licence

在CCUR中所有的数据项都受到原著作权保护.

数据加载中.....