Guangdong Provincial Engineering Technology Research Center for Sports Assistive Devices, Guangzhou Sport University, Guangzhou, PR China; Department of Kinesiology, Shenyang Sport University, Shenyang, PR China; Li Ning Sports Science Research Center, Beijing, PR China.
School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Australia.
J Biomech. 2019 Nov 11;96:109338. doi: 10.1016/j.jbiomech.2019.109338. Epub 2019 Sep 12.
While it is not uncommon for athletes to use foot orthoses to relieve pain and improve sports performance, little has been known about their effects on basketball performance. Free-throw basketball shooting is very important. However, fatigue deteriorates postural balance which might decrease free-throw shooting performance. This study investigated the effects of foot orthoses on dynamic balance and accuracy performance during free-throw shooting before and after physical fatigue was induced. Thirteen male recreational basketball players were tested with two foot orthoses (medial-arch support versus flat control) and fatigue conditions (before and after fatigue), when they performed standard free-throw shooting on a force platform. Results revealed that fatigue significantly increased coefficient of variance of medial-lateral center of pressure (CoP) excursion when participants worn flat control orthoses (p < 0.05). Meanwhile, foot orthoses improved dynamic balance during shooting as they significantly reduced total resultant and anterior-posterior sway excursions as well as resultant and anterior-posterior CoP velocities, and base of support area. Although this study found that fatigue and orthoses did not significantly affect the scores gained by free-throw shooting, the significant improvements in dynamic balance during shooting with the use of foot orthoses could have considerable impact on motor control during basketball shooting.
虽然运动员使用足部矫形器来缓解疼痛和提高运动表现并不罕见，但对于它们对篮球表现的影响知之甚少。罚球是篮球比赛中非常重要的一部分。然而，疲劳会降低姿势平衡能力，从而可能降低罚球投篮表现。本研究探讨了在诱导身体疲劳前后使用足部矫形器对罚球投篮时动态平衡和准确性表现的影响。13 名男性业余篮球运动员在使用两种足部矫形器（内侧足弓支撑与平底控制）和疲劳条件（疲劳前和疲劳后）下进行测试，他们在力台上进行标准的罚球投篮。结果表明，当参与者穿着平底控制矫形器时，疲劳显著增加了中足压力中心（CoP）偏移的方差系数（p<0.05）。同时，足部矫形器改善了投篮时的动态平衡，因为它们显著降低了总合力和前后摆动幅度以及合力和前后 CoP 速度，以及支撑面积。尽管本研究发现疲劳和矫形器对罚球得分没有显著影响，但使用足部矫形器在投篮时显著提高动态平衡能力，可能对篮球投篮中的运动控制产生重大影响。
