Muscle Fatigue in Shoulder Joint External Rotation due to Consecutive Pitching
[Purpose] The purpose of this study was to clarify whether the shoulder joint external rotation muscles are affected by muscle fatigue from consecutive baseball pitching. [Subject] Ten adult men who had spent more than five years playing baseball participated in this study. [Methods] The muscle acti...
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| Published in: | Rigakuryoho Kagaku Vol. 27; no. 5; pp. 535 - 538 |
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| Main Authors: | , , |
| Format: | Journal Article |
| Language: | Japanese |
| Published: |
The Society of Physical Therapy Science
2012
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| Subjects: | |
| ISSN: | 1341-1667, 2434-2807 |
| Online Access: | Get full text |
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| Summary: | [Purpose] The purpose of this study was to clarify whether the shoulder joint external rotation muscles are affected by muscle fatigue from consecutive baseball pitching. [Subject] Ten adult men who had spent more than five years playing baseball participated in this study. [Methods] The muscle activity in pitching before and after throwing 100 pitches were recorded using surface electromyography. From the recorded electromyography data, we calculated the time required to reach 50%, and 100% maximal voluntary contraction, and maximal value. We compared these values before and after throwing 100 pitches. [Results] After throwing 100 pitches, in terms of maximal value, only the electromyography data of the teres minor was delayed. The others muscles did not show any change. [Conclusion] Fatigue from consecutive baseball pitching weakened all muscles, but electromyography data were non-uniform. |
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| ISSN: | 1341-1667 2434-2807 |
| DOI: | 10.1589/rika.27.535 |