期刊
JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY
卷 22, 期 6, 页码 947-953出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jelekin.2012.06.004
关键词
Tendon; Velocity; Strain rate
资金
- Engineering and Physical Sciences Research Council [United Kingdom] [EP/E013007/1]
Tendon stiffness is calculated by dividing changes in tendon force by tendon elongation. For this purpose, participants are commonly asked to perform a maximal muscle contraction (active'' method). Alternatively tendon elongation can be achieved by means of a passive joint rotation (passive'' method). The purpose of this study was to compare Achilles tendon stiffness obtained from both methods across different tendon strain rates. Twenty adults performed a series of ramped maximum isometric plantar-flexions of different durations. Passive ankle rotations of different angular velocities were also performed. Achilles tendon stiffness was obtained from a combination of motion analysis, isokinetic dynamometry and ultrasonography and compared across methods at three strain rates. At all strain rates, tendon stiffness obtained from the active method was 6% greater compared to the passive method. In spite of this systematic bias, there was good agreement between the methods. Intraclass correlation coefficients were greater than 0.98, and more than 95% of data points fell into the 95% confidence intervals. This agreement will be acceptable in many research contexts. We also found a linear increase in tendon stiffness with increasing strain rate, which must be taken into consideration when interpreting or reporting tendon stiffness. (C) 2012 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据