Neuromechanical Integration of Pelvic-Thoracic Rotation among Youth Baseball Throwers.

Sports medicine international open Pub Date : 2022-07-29 eCollection Date: 2022-01-01 DOI:10.1055/a-1854-1007
Eric Winters, Steven Doty, Melanie Lott, James Baker
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引用次数: 1

Abstract

The kinetic sequencing involved in the overhead throw anticipates an orchestration of body movement in which the more proximal segments of the body initiate movement prior to the more distal segment. This investigation explored neuromuscular and kinematic characteristics associated with one aspect of this kinetic sequencing, pelvic-to-thoracic rotation. Neuromuscular activation was recorded using surface electromyography and kinematic data was acquired using 3D videography. Specific objectives included 1) to describe the maximum angulation between the pelvic and thoracic body segments (X max angle ), 2) to test the hypothesis that glove-side external oblique peak neuromuscular activation (GEOPA) occurs before X max angle , 3) to test the hypothesis that throwing-side external oblique peak neuromuscular activation (TEOPA) occurs following X max angle . Results show the mean X max angle to be 45.96 degrees (±10.83). The time of mean GEOPA (2.3653 sec±0.9094) occurred following the time of mean X max angle (2.2793 sec,±0.9026, p<0.01), thus refuting the first hypothesis. The time of mean TEOPA (2.3658 sec,±0.8978) occurred following the time of mean X max angle (2.2793 sec,±0.9026, p<0.01), thus confirming the second hypothesis. Results suggest that youth baseball participants may not adequately utilize the core of the body to fully benefit from the optimal kinetic sequencing postulated within the literature.

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青少年棒球运动员骨盆-胸椎旋转的神经力学整合。
在头顶投掷中涉及的动力学序列预测了身体运动的编排,其中更近的身体部分在更远的部分之前开始运动。本研究探讨了与该动力学序列的一个方面相关的神经肌肉和运动学特征,即骨盆-胸椎旋转。使用表面肌电图记录神经肌肉的激活情况,并使用3D录像获取运动数据。具体目的包括:1)描述骨盆和胸椎体段之间的最大角度(X最大角度);2)验证手套侧外斜峰神经肌肉激活(GEOPA)发生在X最大角度之前的假设;3)验证投掷侧外斜峰神经肌肉激活(TEOPA)发生在X最大角度之后的假设。结果显示平均X最大角度为45.96°(±10.83)。平均GEOPA时间(2.3653秒±0.9094)发生在平均X最大角度时间(2.2793秒,±0.9026)、p最大角度时间(2.2793秒,±0.9026)之后
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