Effects of bat grip on baseball hitting kinematics.
Effects of bat grip on baseball hitting kinematics.
复制标题
球棒握力对棒球击球运动学的影响。
DOI：
10.1123/jab.25.3.203
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发表时间：
2009
影响因子：
1.4
通讯作者：
J. Andrews
中科院分区：
文献类型：
--
作者：
R. Escamilla;G. Fleisig;Coop Derenne;Marcus K. Taylor;C. Moorman;R. Imamura;E. Barakatt;J. Andrews
一个运动系统收集了14名成年棒球击球手的120赫兹数据，这些击球手使用了正常和窒息的球棒握法。每个击球手的六次摆动被数字化，并计算出时间和运动学参数。与普通握拍相比，阻塞式握拍导致1)步态和挥杆时间减少；2)上半身在铅足接触时更张开；3)骨盆闭合，球拍接触时球杆线速度变小；4)挥杆时上半身和骨盆活动范围变小；5)在引脚接触时肘关节屈曲较大；6)右肘伸展峰值速度较大。在大步阶段，当使用窒息握拍时，时间减少，这意味着击球手在窒息时会加快步伐。较短的挥杆持续时间和较小的上半身和骨盆旋转的运动范围支持了许多教练和球员的信念，即使用扼流握拍可以使挥杆更快。然而，这项研究的结果并不支持使用窒息握法可以让蝙蝠移动得更快的观点。
A motion system collected 120-Hz data from 14 baseball adult hitters using normal and choke-up bat grips. Six swings were digitized for each hitter, and temporal and kinematic parameters were calculated. Compared with a normal grip, the choke-up grip resulted in 1) less time during stride phase and swing; 2) the upper torso more opened at lead foot contact; 3) the pelvis more closed and less bat linear velocity at bat-ball contact; 4) less range of motion of the upper torso and pelvis during swing; 5) greater elbow flexion at lead foot contact; and 6) greater peak right elbow extension angular velocity. The decreased time during the stride phase when using a choke-up grip implies that hitters quicken their stride when they choke up. Less swing time duration and less upper torso and pelvis rotation range of motion using the choke-up grip supports the belief of many coaches and players that using a choke-up grip results in a "quicker" swing. However, the belief that using a choke-up grip leads to a faster moving bat was not supported by the results of this study.