Department of Physical Education and Exercise Science, Lander University, Greenwood, USA.
School of Kinesiology, Auburn University, Auburn, USA.
Int J Sports Med. 2021 Jun;42(8):760-765. doi: 10.1055/a-1303-4369. Epub 2020 Dec 22.
Researchers suggest that motion deriving energy from the more proximal segments of the body is important to reduce injury susceptibility. However, limited clinical assessments have been associated with efficient energy flow within a complex movement such as the baseball pitch. This research aimed to determine the relationship between glenohumeral stability as determined by the closed kinetic chain upper extremity stability test and energy transfer into and out of the humerus during the baseball pitching motion. Kinematic and kinetic data were collected at 240 Hz on twenty-four baseball pitchers. Participants performed the closed kinetic chain upper extremity stability test prior to throwing three fastballs at game speed to a catcher with the fastest fastball used for analysis. Spearman's Rho were used to examine relationships between energy flow in and out of the humerus with glenohumeral stability as determined by the average score and normalized stance width during the closed kinetic chain upper extremity stability test. There was a significant negative correlation between the average score and normalized peak power leaving the humerus ( [22]=-0.42, p=0.04). This result provides preliminary support for the use of the closed kinetic chain upper extremity stability test as a clinical assessment of a pitcher's ability to efficiently transfer energy within the upper extremity during the pitch.
研究人员表明，从身体更靠近近端的部位获得能量的运动对于降低受伤易感性很重要。然而，在像棒球投球这样复杂的运动中，与有效能量流相关的有限临床评估与有效能量流相关。本研究旨在确定闭合式动力链上肢稳定性测试确定的盂肱关节稳定性与棒球投球运动中肱骨头进出的能量传递之间的关系。在 240Hz 下收集了二十四名棒球投手的运动学和动力学数据。参与者在以最快的棒球速度向接球手投掷三个快球之前进行了闭合式动力链上肢稳定性测试，使用最快的快球进行分析。Spearman's Rho 用于检查在闭合式动力链上肢稳定性测试中，肱骨头进出的能量流动与盂肱关节稳定性之间的关系，由平均得分和标准化站位宽度确定。平均得分与离开肱骨头的归一化峰值功率之间存在显著负相关（ [22]=-0.42，p=0.04）。这一结果初步支持了使用闭合式动力链上肢稳定性测试作为对投手在投球过程中上肢有效能量传递能力的临床评估。
