Quadriceps dysfunction is a common, chronic complication following anterior cruciate ligament reconstruction (ACLR) that contributes to aberrant gait biomechanics and poor joint health. Vibration enhances quadriceps function in individuals with ACLR, but the duration of these effects is unknown. This study evaluated the time course of the effects of whole body vibration (WBV) and local muscle vibration (LMV) on quadriceps function. Twenty-four volunteers with ACLR completed 3 testing sessions during which quadriceps isometric peak torque, rate of torque development, and EMG amplitude were assessed prior to and immediately, 10, 20, 30, 45, and 60 min following a WBV, LMV, or control intervention. WBV and LMV (30 Hz, 2g) were applied during six one-minute bouts. WBV increased peak torque 5–11% relative to baseline and control at all post-intervention time points. LMV increased peak torque 6% relative to baseline at 10 min post-intervention and 4–6% relative to control immediately, 10 min, and 20 min post-intervention. The interventions did not influence EMG amplitudes or rate of torque development. The sustained improvements in quadriceps following vibration, especially WBV, suggest that it could be applied at the beginning of rehabilitation sessions to “prime” the central nervous system, potentially improving the efficacy of ACLR rehabilitative exercise.

股四头肌功能障碍是前十字韧带重建（ACLR）后常见的慢性并发症，导致步态生物力学异常和关节健康不良。振动可增强ACLR患者的股四头肌功能，但这些作用的持续时间未知。这项研究评估了全身振动（WBV）和局部肌肉振动（LMV）对股四头肌功能的影响的时程。24名ACLR志愿者完成了3次测试，在WBV，LMV或WBV之前或之后10分钟，20分钟，30分钟，45分钟和60分钟评估了股四头肌等距峰值扭矩，扭矩发展速率和EMG振幅。控制干预。WBV和LMV（30 Hz，2 g）进行了六次一分钟的回合。在所有干预后的时间点，WBV相对于基线和对照的峰值扭矩增加了5-11％。干预后10分钟，LMV相对于基线将峰值扭矩增加6％，而干预后立即，10分钟和20分钟，LMV则相对于对照增加4–6％。干预措施没有影响肌电图振幅或扭矩的发展速度。振动后股四头肌的持续改善，尤其是WBV，表明它可在康复训练开始时用于“灌注”中枢神经系统，有可能提高ACLR康复锻炼的功效。