Oliver Gretchen Dawn, Weimar Wendi
a School of Kinesiology , Auburn University , Auburn , USA.
J Sports Sci. 2015;33(14):1447-53. doi: 10.1080/02640414.2014.990493. Epub 2014 Dec 20.
Lower to upper extremity sequencing of energy and force is linked by virtue of the scapula. It was the purpose of this study to examine the relationship between passive hip rotational range of motion and scapular kinematics during baseball pitching. Nineteen youth baseball players (11.3 ± 0.6 years; 151.8 ± 8.8 cm; 45.9 ± 10.9 kg) with no history of injury participated. Bilateral hip passive rotational range of motion was measured pre and post pitching a simulated game. Scapular kinematics at the position of shoulder maximum external rotation during the pitching cycle were recorded in the first and last innings of the simulated game. Post simulated game, stance leg hip passive internal rotation revealed significant correlations (r = -0.57, P = 0.01) with scapula anterior/posterior tilt at the pitching event of maximum humeral external rotation. The current study reveals that pitching a simulated game results in alterations throughout the kinetic chain. Specifically, this study strengthens the notion that lumbopelvic-hip complex parameters play a significant role in shoulder motion. With this link identified, it is suggested that clinical focus be directed musculature about the lumbopelvic-hip complex as well as muscles that work to stabilise the scapula during dynamic movement.
能量和力量从下肢到上肢的传导通过肩胛骨相联系。本研究的目的是探讨棒球投球过程中被动髋关节旋转活动范围与肩胛骨运动学之间的关系。19名无损伤史的青少年棒球运动员（11.3±0.6岁；151.8±8.8厘米；45.9±10.9千克）参与了研究。在模拟比赛投球前后测量双侧髋关节被动旋转活动范围。在模拟比赛的第一局和最后一局记录投球周期中肩部最大外旋位置时的肩胛骨运动学情况。模拟比赛后，站立腿髋关节被动内旋与肱骨最大外旋投球事件时肩胛骨的前/后倾斜度呈现显著相关性（r = -0.57，P = 0.01）。本研究表明，进行模拟比赛会导致整个动力链发生改变。具体而言，本研究强化了这样一种观念，即腰骶骨盆-髋关节复合体参数在肩部运动中起着重要作用。鉴于已确定这种联系，建议临床关注腰骶骨盆-髋关节复合体周围的肌肉组织以及在动态运动中稳定肩胛骨的肌肉。
