Werner David M, Mostaed Maria F, Price Samantha K, Barrios Joaquin A
Division of Physical Therapy Education, University of Nebraska Medical Center; Medical Sciences Interdepartmental Area Program, University of Nebraska Medical Center.
Department of Physical Therapy, University of Dayton.
Int J Sports Phys Ther. 2022 Feb 1;17(2):201-209. doi: 10.26603/001c.31881. eCollection 2022.
There are persistent deficits of the proximal musculature in individuals with anterior cruciate ligament reconstruction. Previous research has shown that proximal musculature fatigue alters drop vertical jump performance in healthy individuals. It is unknown how proximal musculature fatigue will alter drop vertical jump performance in individuals who have undergone anterior cruciate ligament reconstruction.
HYPOTHESIS/PURPOSE: The purpose of this study was to examine the effects of a proximal extensor musculature fatigue protocol on drop vertical jump landing biomechanics of individuals with a history of anterior cruciate ligament reconstruction using both single-joint parameters and total support moment analysis.
Quasi-experimental pre-post laboratory experiment.
Nineteen participants with a history of unilateral anterior cruciate ligament reconstruction were recruited. Three-dimensional motion analysis was performed bilaterally during a drop vertical jump. Participants then completed a proximal extensor musculature fatigue protocol and immediately repeated the drop vertical jump task. Sagittal plane kinetics and kinematics were collected. Joint contributions to peak total support moment were calculated. A condition-by-limb repeated measures analysis of variance was performed to explore the effects of the fatigue protocol, using an alpha level of 0.05.
There were no interactions observed for any parameters. However, the injured limb demonstrated less vertical ground reaction force (13%, p=0.013) and reduced peak dorsiflexion angle (2°, p=0.028) both before and after the protocol. After the fatigue protocol both limbs demonstrated reduced hip extensor contribution to peak total support moment (4%, p=0.035).
Individuals with a history of anterior cruciate ligament reconstruction performed the drop vertical jump with an altered anti-gravity support strategy after the proximal extensor musculature fatigue protocol. The significant reduction in bilateral hip extensor contribution to peak total support moment suggests evidence of targeted fatigue.
III.
前交叉韧带重建患者存在近端肌肉组织的持续功能缺陷。先前的研究表明，近端肌肉组织疲劳会改变健康个体的垂直跳落性能。目前尚不清楚近端肌肉组织疲劳如何改变前交叉韧带重建患者的垂直跳落性能。
假设/目的：本研究的目的是使用单关节参数和总支撑力矩分析，研究近端伸肌肌肉组织疲劳方案对有前交叉韧带重建病史个体的垂直跳落着地生物力学的影响。
准实验性前后实验室实验。
招募了19名有单侧前交叉韧带重建病史的参与者。在垂直跳落过程中对双侧进行三维运动分析。参与者随后完成近端伸肌肌肉组织疲劳方案，并立即重复垂直跳落任务。收集矢状面动力学和运动学数据。计算关节对总支撑力矩峰值的贡献。使用0.05的显著性水平进行条件×肢体重复测量方差分析，以探讨疲劳方案的影响。
未观察到任何参数的交互作用。然而，在方案前后，受伤肢体的垂直地面反作用力均较小（13%，p=0.013），背屈峰值角度减小（2°，p=0.028）。在疲劳方案后，双下肢的髋伸肌对总支撑力矩峰值的贡献均降低（4%，p=0.035）。
有前交叉韧带重建病史的个体在近端伸肌肌肉组织疲劳方案后，以改变的抗重力支撑策略进行垂直跳落。双侧髋伸肌对总支撑力矩峰值的贡献显著降低，表明存在针对性疲劳的证据。
III级。
