Department of Kinesiology, California State University, Fullerton, Fullerton, California.
Department of Kinesiology, California State University, Fullerton, Fullerton, California.
Arch Phys Med Rehabil. 2018 May;99(5):973-980. doi: 10.1016/j.apmr.2017.11.019. Epub 2018 Jan 31.
To examine the effect of whole-body vibration (WBV) on running biomechanics in individuals with anterior cruciate ligament reconstruction (ACLR).
Single-blind randomized crossover trial.
Research laboratory.
Individuals (N=20) with unilateral ACLR (age [± SD]=22.3 [±3.3] years; mass=71.8 [±15.3] kg; time since ACLR=44.9 [±22.8] months; 15 females, 10 patellar tendon autograft, 7 hamstrings autograft, 3 allograft; International Knee Documentation Committee Score=83.5 [±9.3]).
Participants performed isometric squats while being exposed to WBV or no vibration (control). WBV and control conditions were delivered in a randomized order during separate visits separated by 1-week washout periods. Running biomechanics of the injured and uninjured limbs were evaluated before and immediately after each intervention. Dependent variables included peak vertical ground reaction force (GRF) and loading rate (LR), peak knee flexion angle and external moment, and knee flexion excursion during the stance phase of running.
There was an increase in knee flexion excursion (+4.1°, 95% confidence interval [CI]: 0.65, 7.5°) and a trend toward a reduction in instantaneous LR after WBV in the injured limb (-4.03 BW/sec, 95% CI -0.38, -7.69). No effect was observed on peak GRF, peak knee flexion angle, or peak external knee flexion moment, and no effect was observed in the uninjured limb.
Our findings indicate that a single session of WBV acutely increases knee flexion excursion. WBV could be useful to improve running characteristics in individuals with knee pathology.
研究全身振动（WBV）对前交叉韧带重建（ACLR）个体跑步生物力学的影响。
单盲随机交叉试验。
研究实验室。
单侧 ACLR 个体（N=20；年龄[±标准差]=22.3[±3.3]岁；体重=71.8[±15.3]kg；ACL 重建后时间=44.9[±22.8]个月；女性 15 名，髌腱自体移植物 10 名，腘绳肌自体移植物 7 名，同种异体移植物 3 名；国际膝关节文献委员会评分=83.5[±9.3]）。
参与者在进行等长深蹲时，分别暴露于 WBV 或无振动（对照）环境中。在每个干预措施前后，均对 WBV 和对照条件下的健肢和患肢的跑步生物力学进行评估。测试指标包括垂直地面峰值反作用力（GRF）和加载率（LR）、峰值膝关节屈曲角度和外部力矩、以及跑步支撑阶段的膝关节屈曲伸展。
在患肢中，WBV 后膝关节屈曲伸展增加（+4.1°，95%置信区间[CI]：0.65，7.5°），瞬时 LR 呈下降趋势（-4.03 BW/sec，95%CI：-0.38，-7.69）。在健肢中，未观察到峰值 GRF、峰值膝关节屈曲角度或峰值外部膝关节屈曲力矩的变化。
单次 WBV 可使膝关节屈曲伸展增加，这一发现表明 WBV 可能有助于改善膝关节病理患者的跑步特征。
