Alteration in Muscle Fatigue Caused by Load-Type Differences during Isometric Flexion of Human Fingers
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- ASAI Tomoya
- Department of Mechanical and Control Engineering, Kyushu Institute of Technology
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- 田川 善彦
- 九州工業大学大学院 工学研究院
Bibliographic Information
- Other Title
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- 手指等尺性屈曲保持における負荷タイプの違いによる疲労差
Abstract
We measured the endurance time and force and assessed the electromyograms of the flexor digitorum muscle and extensor digitorum muscle in response to 2 types of submaximal fatiguing. The 2 tasks involved isometric contraction of the proximal interphalangeal joint flexor muscles at 50% of the maximum voluntary contraction (MVC) force, which was achieved either by maintaining a constant force while pulling a force transducer (force task) or by supporting an equivalent load while maintaining a constant proximal interphalangeal joint angle (position task). Seven men performed the 2 tasks with their index, middle, and ring fingers. For all 3 fingers, the endurance time for the force task (79 ± 22, 93 ± 46, and 96 ± 56 s for the index, middle, and ring fingers, respectively) was shorter than the corresponding values for the position task (141 ± 105, 147 ± 82, and 212 ± 91 s). The rate of change in amplitude and mean power frequency in the electromyogram did not significantly differ across the 2 tasks. Physiological tremor was computed from the recorded force signal. The physiological tremor initially decreased during both tasks; however, the subsequent increase occurred earlier during the force task.
Journal
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- TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
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TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C 78 (790), 2152-2161, 2012
The Japan Society of Mechanical Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390001206386049536
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- NII Article ID
- 130002051474
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- ISSN
- 18848354
- 03875024
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed