A Comparison of Age Level on Baseball Hitting Kinematics
A Comparison of Age Level on Baseball Hitting Kinematics
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DOI：
10.1123/jab.25.3.210
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发表时间：
2009-08-01
影响因子：
1.4
通讯作者：
Andrews, James R.
中科院分区：
文献类型：
--
作者：
Escamilla, Rafael F.;Fleisig, Glenn S.;Andrews, James R.
我们建议，学习正确的击球运动学应该鼓励在年轻的时候，在青年棒球，因为这可能有助于加强正确的击球运动学作为一个球员的进步，以更高的水平，在他们的成年棒球。为了提高我们的理解之间的青年和成人棒球击球，棒球击球的运动学和时间分析进行了评估与12个熟练的青年和12个熟练的成人棒球运动员之间的高速运动分析系统。青少年和成年打者之间只有少量的时间差异，在步幅阶段和挥杆过程中，成年打者比青少年打者花费更多的时间。与青少年击球手相比，成年击球手a）（p < .01）当手开始向前移动时，引导膝关节屈曲; B）在过渡阶段期间，引导膝关节在更大的运动范围内屈曲（31度对13度）; c）在球棒加速阶段，在更大的运动范围内延长铅膝（59度对32度）; d）在前脚离开地面时保持更开放的骨盆位置;以及e）当手开始向前移动时保持更开放的上躯干位置，并且在击球接触时保持更闭合的上躯干位置。此外，成年击球手有更大的上躯干峰值角速度（857度/秒对717度/秒），左肘伸展峰值角速度（752度/秒对598度/秒），左膝伸展峰值角速度（386度/秒对303度/秒），以及击球接触时的球棒线速度（30米/秒对25米/秒）。青少年和成年击球手之间的运动学和时间参数的众多差异表明，这两个群体之间的击球力学是不同的。
We propose that learning proper hitting kinematics should be encouraged at a young age during youth baseball because this may help reinforce proper hitting kinematics as a player progresses to higher levels of baseball in their adult years. To enhance our understanding between youth and adult baseball hitting, kinematic and temporal analyses of baseball hitting were evaluated with a high-speed motion analysis system between 12 skilled youth and 12 skilled adult baseball players. There were only a small number of temporal differences between youth and adult hitters, with adult hitters taking significantly greater time than youth hitters during the stride phase and during the swing. Compared with youth hitters, adult hitters a) had significantly greater (p < .01) lead knee flexion when the hands started to move forward; b) flexed the lead knee over a greater range of motion during the transition phase (31 degrees versus 13 degrees); c) extended the lead knee over a greater range of motion during the bat acceleration phase (59 degrees versus 32 degrees); d) maintained a more open pelvis position at lead foot off ground; and e) maintained a more open upper torso position when the hands started to move forward and a more closed upper torso position at bat-ball contact. Moreover, adult hitters had greater peak upper torso angular velocity (857 degrees/s versus 717 degrees/s), peak left elbow extension angular velocity (752 degrees/s versus 598 degrees/s), peak left knee extension angular velocity (386 degrees/s versus 303 degrees/s), and bat linear velocity at bat-ball contact (30 m/s versus 25 m/s). The numerous differences in kinematic and temporal parameters between youth and adult hitters suggest that hitting mechanics are different between these two groups.