2010年5月
Fatigue-induced changes in synergistic muscle force do not match tendon elongation
JOURNAL OF BIOMECHANICS
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- 巻
- 43
- 号
- 8
- 開始ページ
- 1632
- 終了ページ
- 1634
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1016/j.jbiomech.2010.01.016
- 出版者・発行元
- ELSEVIER SCI LTD
This study aimed to investigate whether fatigue-induced changes in synergistic muscle forces match their tendon elongation. The medial gastrocnemius muscle (MG) was fatigued by repeated electrical stimulation (1 min x 5 times: interval 30 s, intensity: 20-30% of maximal voluntary plantar flexion torque) applied at the muscle belly under a partial occlusion of blood vessels. Before and after the MG fatigue task, ramp isometric contractions were performed voluntarily, during which tendon elongations were determined by ultrasonography, along with recordings of the surface EMG activities of MG, the soleus (SOL) and the lateral gastrocnemius (LG) muscles. The tendon elongation of MG and SOL in post-fatigue ramp was similar, although evoked MG forces dropped nearly to zero. In addition, for a given torque output, the tendon elongation of SOL significantly decreased while that of LG did not, although the activation levels of both muscles had increased. Results suggest that the fatigue-induced changes in force of the triceps surae muscles do not match their tendon elongation. These results imply that the tendons of the triceps surae muscles are mechanically coupled even after selective fatigue of a single muscle. (C) 2010 Elsevier Ltd. All rights reserved.
- リンク情報
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- DOI
- https://doi.org/10.1016/j.jbiomech.2010.01.016
- CiNii Articles
- http://ci.nii.ac.jp/naid/80021074502
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/20398904
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000278652000030&DestApp=WOS_CPL
- ID情報
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- DOI : 10.1016/j.jbiomech.2010.01.016
- ISSN : 0021-9290
- eISSN : 1873-2380
- CiNii Articles ID : 80021074502
- PubMed ID : 20398904
- Web of Science ID : WOS:000278652000030