Absence of an effect of fatigue on muscle efficiency during high-intensity exercise in rat skeletal muscle

被引：5
作者：
deHaan, A
Koudijs, JCM
Verburg, E
机构：
[1] Verburg Institute for Fundamental and Clinical Human Movement Sciences, Faculty of Human Movement Sciences, Vrije University, 1081 BT Amsterdam
来源：
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY AND OCCUPATIONAL PHYSIOLOGY | 1996年 / 72卷 / 5-6期
关键词：
muscle; fatigue; efficiency;
D O I：
10.1007/BF00242292
中图分类号：
Q4 [生理学];
学科分类号：
071003 ;
摘要：
The effect of fatigue was studied on rat skeletal muscle efficiency during maximal dynamic exercise of 10s duration. After the initial 4s of exercise, power output decreased rapidly to 46.2 +/- 6.7% (mean +/- SD; n=6) after 6s of stimulation and further to 17.5 +/- 5.8% in the last contraction, Both the rates of total work output and high-energy phosphate consumption decreased with increasing exercise duration, As a result muscle efficiency was not affected by exercise time in the present experiments. This result indicates that fatigue in severe maximal exercise is induced by a feed-back mechanism, which in the case of high ATP utilisation rates will reduce ATP splitting probably by reducing Ca2+-release from the sarcoplasmic reticulum.
引用
收藏
页码：570 / 572
页数：3
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