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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Veröffentlicht in:Rigakuryoho Kagaku Jg. 27; H. 5; S. 535 - 538
Hauptverfasser: YAMANAKA, Yuki, YOSHIHARA, Keisuke, URABE, Yukio
Format: Journal Article
Sprache:Japanisch
Veröffentlicht: The Society of Physical Therapy Science 2012
Schlagworte:
baseball
muscle fatigue
shoulder joint external rotation group
ISSN:1341-1667, 2434-2807
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Zusammenfassung:[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.
ISSN:1341-1667
2434-2807
DOI:10.1589/rika.27.535