重复性投球对大学棒球投手下肢关节控制及质心的影响。
Effect of Repetitive Pitching on the Control of Lower Extremity Joints and Center of Mass in Collegiate Baseball Pitchers.
作者信息
Wang Shiu-Min, Huang Tsun-Shun, Chen Szu-Hua, Wu Yuh-Renn, Hsu Wei-Li
机构信息
School and Graduate Institute of Physical Therapy, College of Medicine, National Taiwan University, Taipei, Taiwan.
Department of Physical Therapy and Assistive Technology, National Yang Ming Chiao Tung University, Taipei, Taiwan.
出版信息
Sports Health. 2024 Sep 4:19417381241273264. doi: 10.1177/19417381241273264.
BACKGROUND
Repetitive motion can alter joint angles and subsequently affect the control of the center of mass (CoM). While the CoM has been studied as a fatigue indicator in various sports, the control of the whole-body CoM during repetitive pitching in baseball pitchers has not been examined. This study aimed to investigate changes in lower-extremity joint angles and CoM control in collegiate baseball pitchers after repetitive pitching.
HYPOTHESIS
Baseball pitchers would exhibit significant increase in lower-extremity flexion angles, CoM position, and CoM variability after repetitive pitching.
STUDY DESIGN
Descriptive laboratory study.
LEVEL OF EVIDENCE
Level 3.
METHODS
A total of 23 pitchers from the Collegiate Baseball League were recruited. A motion analysis system was employed to assess lower-extremity joint angles and CoM position during the simulated game, while pitching accuracy and velocity were also recorded.
RESULTS
The results revealed a significant forward and downward shift in CoM position ( < 0.05), along with increased CoM variability in all directions ( < 0.05) after the simulated game. Furthermore, there was a significant increase in flexion angles of the knee and hip ( < 0.05); however, pitching velocity and accuracy did not demonstrate significant changes.
CONCLUSION
Repetitive pitching leads to kinematic changes that should be monitored to prevent sports injuries.
CLINICAL RELEVANCE
Baseball pitchers have the ability to modify the control of their CoM and angles of their lower-extremity joints to sustain their pitching performance. It is crucial to monitor compensatory strategies closely to avoid shoulder and elbow injuries among these pitchers.
背景
重复性动作会改变关节角度，进而影响重心（CoM）控制。虽然重心已被作为各类运动中的疲劳指标进行研究，但棒球投手在重复性投球过程中全身重心的控制尚未得到研究。本研究旨在调查大学棒球投手在重复性投球后下肢关节角度和重心控制的变化。
假设
棒球投手在重复性投球后，其下肢屈曲角度、重心位置和重心变异性会显著增加。
研究设计
描述性实验室研究。
证据水平
3级。
方法
招募了23名来自大学棒球联盟的投手。在模拟比赛期间，使用运动分析系统评估下肢关节角度和重心位置，同时记录投球准确性和速度。
结果
结果显示，模拟比赛后重心位置显著向前和向下移动（P<0.05），且各方向的重心变异性均增加（P<0.05）。此外，膝关节和髋关节的屈曲角度显著增加（P<0.05）；然而，投球速度和准确性没有显著变化。
结论
重复性投球会导致运动学变化，应对此进行监测以预防运动损伤。
临床意义
棒球投手有能力调整其重心控制和下肢关节角度，以维持其投球表现。密切监测代偿策略对于避免这些投手中的肩部和肘部损伤至关重要。
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