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首页> 外文期刊>Orthopaedic Journal of Sports Medicine >Relationship of Glove Arm Kinematics With Established Pitching Kinematic and Kinetic Variables Among Youth Baseball Pitchers
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Relationship of Glove Arm Kinematics With Established Pitching Kinematic and Kinetic Variables Among Youth Baseball Pitchers

机译：青少年棒球投手手套臂运动学与既定投球运动学和动力学变量的关系

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Background: While the kinematics of the pitching arm, trunk, and pelvis have been described and studied, glove arm kinematics remain an understudied portion of the pitching motion. Baseball pitchers seek to achieve maximum ball velocity in a fashion that does not place the arm at risk of injury. Purpose: To assess the relationship between glove arm shoulder horizontal abduction and elbow flexion and pitching arm kinematics and kinetics among youth pitchers to determine whether recommendations can be made toward a safer pitching motion. Study Design: Descriptive laboratory study. Methods: Thirty-three right-handed youth male baseball pitchers (mean ± SD: age, 13.6 ± 2.0 years; height, 169.4 ± 14.3 cm; weight, 63.5 ± 13.0 kg; experience, 7.3 ± 3.0 years) threw 3 fastballs to a catcher while kinematic data were collected with an electromagnetic tracking system. The Spearman rank-order test was used to identify relationships between glove arm horizontal abduction and glove arm elbow flexion and various kinematics and kinetics found at maximum shoulder external rotation (MER) and ball release for the fastest fastball delivered by each participant. Results: At MER, there were significant relationships found between a more flexed glove arm elbow and increased pitching arm elbow valgus force ( r_(s) [31] = –0.52, P = .002), increased pitching arm shoulder anterior force ( r_(s) = –0.39, P = .024), and decreased hip velocity ( r_(s) [31] = –0.45, P = .009). Additionally, there were significant relationships between greater glove arm horizontal abduction at MER and increased pitching arm humeral velocity ( r_(s) [31] = 0.52, P = .002) and increased trunk rotational velocity ( r_(s) [31] = 0.40, P = .022) at MER. Conclusion: A more extended glove arm elbow and more horizontally abducted glove arm shoulder at MER could prove to be more advantageous for performance and possibly be a safer motion for the baseball thrower. Clinical Relevance: The orthopaedic community can dictate safer biomechanics when communicating with pitchers, trainers, and pitching coaches.
机译：背景：虽然已经描述和研究了俯仰臂，躯干和骨盆的运动学，但是手套臂的运动学仍是俯仰运动中一项尚未充分研究的部分。棒球投手试图以不会使手臂受伤的方式实现最大的球速。目的：评估青年投手之间手套臂肩膀水平外展与肘部屈曲以及俯仰臂运动学和动力学之间的关系，以确定是否可以提出更安全的俯仰运动建议。研究设计：描述性实验室研究。方法：33名右撇子青年男性投手（平均年龄：13.6±2.0岁;身高：169.4±14.3厘米;体重：63.5±13.0公斤;经验：7.3±3.0岁）投掷3个快球使用电磁跟踪系统收集运动数据的同时捕获。 Spearman等级测试用于确定手套臂水平外展和手套臂肘部弯曲之间的关系，以及在最大肩外旋（MER）和释放球时发现的各种运动学和动力学，以使每个参与者都能以最快的速度传递快球。结果：在MER处，手套臂弯度更高与俯仰臂肘外翻力增加之间存在显着关系（r_（s）[31] = –0.52，P = .002），俯仰臂肩前向力增加（r_ （s）= –0.39，P = .024），并且髋关节速度降低（r_（s）[31] = –0.45，P = .009）。此外，在MER处更大的手套臂水平外展与俯仰臂肱骨速度增加（r_（s）[31] = 0.52，P = .002）和躯干旋转速度增加（r_（s）[31] = 0.40，P = .022）。结论：在MER处，将手套臂的肘部延伸得更远，将手套臂的肩部水平绑住会更有利于表现，并且可能对投球手来说是更安全的动作。临床意义：与投手，教练和投手教练交流时，骨科界可以要求更安全的生物力学。

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