Department of Sport Rehabilitation and Health, Faculty of Sport Sciences and Health, Shahid Beheshti University, Tehran, Iran.
Department of Sport Injuries and Corrective Exercises, Sport Sciences Research Institute, Tehran, Iran.
J Strength Cond Res. 2023 Feb 1;37(2):337-342. doi: 10.1519/JSC.0000000000004201. Epub 2021 Dec 23.
Dalvandpour, N, Zareei, M, Abbasi, H, Abdoli, B, Mohammadian, MA, Rommers, N, and Rössler, R. Focus of attention during ACL injury prevention exercises affects improvements in jump-landing kinematics in soccer players: a randomized controlled trial. J Strength Cond Res 37(2): 337-342, 2023-Anterior cruciate ligament tears are severe and complex knee injuries that commonly occur in soccer. Prevent injuries enhance performance (PEP) is an exercise-based prevention program to effectively reduce anterior cruciate ligament injuries. It is, however, unclear how the delivery of the program contributes to its effectiveness. Therefore, we aimed to investigate the effect of the focus of attention that was emphasized during the delivery of the PEP program on jump-landing kinematics in male, elite-level, U21 soccer players. Forty-two players participated in this randomized controlled trial and were allocated to (a) the internal focus of attention (IF) group, receiving instructions focusing on the execution of the exercise (b), the external focus of attention (EF) group, receiving instructions focusing on the outcome of the exercise, or (c) the control group. Before and after the 8-week intervention, players performed a jump-landing task during which we measured hip and knee angles at the initial contact, peak knee flexion, and peak vertical ground reaction force using a 3-dimensional motion analyzer. A repeated-measures analysis of variance was used to compare groups over time. Significant time-by-group interaction effects with large effect sizes were found for hip flexion at all moments (p < 0.032; η2 > 0.15) and for the knee flexion angle at initial contact and maximum knee flexion (p < 0.001; η2 > 0.35), all in favor of the EF group. This shows that EF during PEP improves hip and knee joint kinematics in the sagittal plane more than IF. Therefore, EF during PEP instructions is preferred to increase the effectiveness of this injury prevention program.
达尔万德普尔、扎雷、阿巴希、阿卜杜利、莫哈马迪、罗默斯和罗瑟勒。在 ACL 损伤预防练习中注意力焦点会影响足球运动员跳跃着陆运动学的改善：一项随机对照试验。J 力量与调理研究 37(2):337-342，2023-前交叉韧带撕裂是一种严重且复杂的膝关节损伤，常见于足球运动中。预防损伤增强表现（PEP）是一种基于运动的预防计划，可有效减少前交叉韧带损伤。然而，尚不清楚该计划的实施方式如何促进其有效性。因此，我们旨在研究在实施 PEP 计划过程中强调的注意力焦点如何影响男性精英 U21 足球运动员的跳跃着陆运动学。42 名球员参加了这项随机对照试验，并被分配到（a）内部注意力焦点（IF）组，接受专注于运动执行的指导；（b）外部注意力焦点（EF）组，接受专注于运动结果的指导；或（c）对照组。在 8 周干预前后，球员们进行了跳跃着陆任务，在此期间，我们使用三维运动分析器测量初始接触、最大膝关节屈曲和最大垂直地面反作用力时的髋关节和膝关节角度。使用重复测量方差分析比较组间随时间的变化。在所有时刻（p < 0.032；η2 > 0.15）和初始接触和最大膝关节屈曲时的膝关节屈曲角度（p < 0.001；η2 > 0.35）都发现了具有大效应量的时间-组交互作用效应，所有这些都有利于 EF 组。这表明，PEP 期间的 EF 比 IF 更能改善矢状面髋关节和膝关节的运动学。因此，在 PEP 指导中使用 EF 更有利于提高该损伤预防计划的效果。
