A comparison of kinetics in the lower limbs between baseball tee and pitched ball batting
A comparison of kinetics in the lower limbs between baseball tee and pitched ball batting
复制标题
DOI：
10.1016/j.humov.2018.07.010
复制
发表时间：
2018-10-01
影响因子：
2.1
通讯作者：
Kanahori, Tetsuya
中科院分区：
文献类型：
--
作者：
Ae, Kazumichi;Koike, Sekiya;Kanahori, Tetsuya
本研究借由比较发球与击球时下肢的运动特性，探讨击球时下肢的运动特性。参与者是10名男性大学棒球运动员，他们进行发球击球（TB）和使用投球机击球（MB;近似球速：33.3 m/s）。使用运动捕捉系统获得三维坐标数据，并使用三个测力平台测量地面反作用力。通过逆动力学计算得到下肢关节力矩。结果表明，下躯干的旋转角速度在TB比MB大。从跨步脚与地面接触到球的影响，摆动时间显着长于MB比TB。双侧髋内收，枢轴髋外旋，跨步髋关节和膝关节伸展扭矩的角度脉冲显着较大的MB，这表明击球手施加这些关节扭矩更早的投球处理时间的限制，通过改变旋转的下躯干在MB中的未知球的位置和速度。这些发现将有助于填补文献中的空白，并为改善击球动作提供教练见解。
In this study, the kinetic characteristics of lower limbs during batting were investigated by comparing batting off a tee with batting a pitched ball. Participants were 10 male collegiate baseball players who performed tee batting (TB) and batting using a pitching machine (MB; approximate ball speed: 33.3 m/s). Three-dimensional coordinate data were acquired using a motion capture system, and ground reaction forces were measured using three force platforms. Lower limb joint torques were obtained by inverse dynamics calculations. The results indicated that the angular velocity of the lower trunk was larger in TB than in MB for rotation. The swing time from stride foot contact with the ground to ball impact was significantly longer in MB than in TB. The angular impulses of bilateral hip adduction, pivot hip external rotation, and stride hip and knee extension torques were significantly larger in MB, suggesting that batters exert these joint torques earlier for pitched balls to handle time constraints by changing the rotation of the lower trunk in response to the unknown ball location and speed in MB. These findings will help to fill a gap in the literature and provide coaching insights for improving batting motion.