The effect of contraction type on muscle strength, work and fatigue in maximal isokinetic exercise

被引：18

作者：

Baroni, Bruno Manfredini ^{[1
]}

Alvim Stocchero, Cintia Mussi ^{[1
]}

do Espirito Santo, Rafaela Cavalheiro ^{[1
]}

Ritzel, Cintia Helena ^{[1
]}

Vaz, Marco Aurelio ^{[1
]}

机构：

[1] Univ Fed Rio Grande do Sul, Phys Educ Sch, Exercise Res Lab, BR-90690200 Porto Alegre, RS, Brazil

来源：

ISOKINETICS AND EXERCISE SCIENCE | 2011年 / 19卷 / 03期

关键词：

Knee extensors; concentric exercise; eccentric exercise; task-dependency; ECCENTRIC EXERCISE; MECHANISMS; FORCE; HYPERTROPHY; ADAPTATIONS; STRETCH; DAMAGE; KNEE;

D O I：

10.3233/IES-2011-0421

中图分类号：

R318 [生物医学工程];

学科分类号：

100103 [病原生物学];

摘要：

This study investigated knee extensor muscle strength, work and fatigue level under maximal isokinetic concentric and eccentric exercise. Seventeen male athletes were randomized into two groups and performed 10 sets of 10 maximal isokinetic concentric (N = 8) or eccentric (N = 9) contractions. Knee extensor peak torque and mean torque values per set were 54-121% and 53-133% higher in eccentric compared to concentric exercise, respectively, whereas the percent fall of performance in these variables was more accentuated in concentric exercise. Total work was significantly higher in eccentric exercise (19475 J) than concentric exercise (15758 J), while fatigue index was greater in concentric (36%) than eccentric (18%) exercise. In conclusion, maximal isokinetic eccentric exercise promotes larger overload to knee extensor muscles than its concentric counterpart due to higher torque produced by the muscle group and also thanks to minor muscle fatigue effects.

引用

页码：215 / 220

页数：6

共 34 条

[1]

Skeletal muscle fatigue: Cellular mechanisms [J].