指爪用保護膜の利用が投動作に及ぼす影響について

抄録

The purpose of this study was to verify the effect of applying nail protectors on the throwing motion and to improve the throwing performance. Three male handball players(19.67±1.46y, 174.67±5.51cm and 72.67±5.03kg) who played at Division 1 Tokai Student Handball organization participated in this study. At the first, throwing motions were recorded by the three-dimensional motion capture system(200Hz) in order to reveal the difference of throwing motions while applying the nail protectors and not applying them. At the second, subjects wore surface myoelectric potential sensor at two locations of muscle activity in two conditions. As the results, in the analysis of the throwing motion it was revealed that the external rotation of shoulder while applying the nail protectors showed significantly greater ROM than while not applying them at the moment of the Stride Foot Contact as the result of analyzing the series of the throwing motion on each phase. Besides, the analysis of surface myoelectric potential sensor revealed nail protector change the muscle activity of Brachioradialis extremely. For these reasons, applying nail protector can improves the throwing performance and the pronation of forearm at the release of the ball.