Svantesson U, Osterberg U, Thomeé R, Grimby G
Department of Rehabilitation Medicine, Sahlgrenska University Hospital, Göteborg, Sweden.
Scand J Rehabil Med. 1998 Jun;30(2):67-72.
The fatigue process of the triceps surae was evaluated during a standing heel-rise test, comprising of eccentric and concentric muscle actions. Ten healthy women with a mean age of 24 years participated. The heel-rise test was performed until exhaustion. Work and electromyographic activity expressed as root mean square and mean power frequency of the gastrocnemius and soleus muscles were calculated. The average number of heel-rises performed was 25 +/- 1. Work decreased significantly during the test. Mean power frequency decreased significantly in both phases. During the eccentric phase the decrease was significantly larger in the gastrocnemius than in the soleus muscle. There were no significant changes in root mean square except for a decrease in the soleus muscle during the eccentric phase. The present results, showing different fatigue patterns in the two muscles, could be used as reference when testing the fatigue process in different clinical conditions. Recommendations for standardization of a heel-rise test are given.
在包括离心和向心肌肉动作的站立提踵测试中，对小腿三头肌的疲劳过程进行了评估。10名平均年龄为24岁的健康女性参与了测试。进行提踵测试直至力竭。计算了以腓肠肌和比目鱼肌的均方根和平均功率频率表示的功和肌电图活动。提踵的平均次数为25±1次。测试期间功显著下降。两个阶段的平均功率频率均显著下降。在离心阶段，腓肠肌的下降幅度比目鱼肌显著更大。除了离心阶段比目鱼肌有下降外，均方根没有显著变化。本研究结果显示了两块肌肉不同的疲劳模式，可作为在不同临床条件下测试疲劳过程时的参考。给出了提踵测试标准化的建议。
