Background

This double-blinded randomized-controlled-trial aimed to identify the effects of an elastic band resistance training on walking kinetics and muscle activities in young adults with genu valgus.

Methods

Forty-two male young adults aged 22.5(2.7) years with genu valgus were randomly allocated to two experimental groups. The intervention group (n = 21) conducted a 14-weeks elastic band resistance training. The control group was passive during the intervention period and received the same treatment after the post-tests. Pre and post training, ground reaction forces and lower limb muscle activities were recorded during walking.

Findings

Results revealed significant group-by-time interactions for peak medial ground reaction force and time-to-peak for posterior ground reaction force in favor of the intervention group (p < 0.012; d = 0.83–3.76). Resistance training with elastic bands resulted in significantly larger peak medial ground reaction force (p < 0.001; d = 1.45) and longer time-to-peak for posterior ground reaction force (p < 0.001; d = 1.85). Finding showed significant group-by-time interactions for peak positive free moment amplitudes in favor of the intervention group (p < 0.001; d = 1.18–2.02). Resistance training resulted in a lower peak positive free moment amplitude (p = 0.001; d = 1.46). With regards to muscle activities, the analysis revealed significant group-by-time interactions for rectus femoris and gluteus medius activities during the push-off phase in favor of the intervention group (p < 0.038; d = 0.68–0.89). Resistance training induced higher rectus femoris (p = 0.038; d = 0.84) and gluteus medius (p = 0.007; d = 0.54) activities.

Interpretation

This study proved the effectiveness of resistance training using elastic bands on kinetics and muscle activities during walking in male adults with genu valgus disorder. Given that this training regime is low cost, effective, and easy-to-administer, we suggest that it should be implemented as a rehabilitative or preventive means for young adults with genu valgus.

中文翻译：

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弹性阻力带运动计划对膝状外翻的年轻成年人行走过程中动力学和肌肉活动的影响：一项双盲随机对照试验

背景

这项双盲随机对照试验旨在确定弹性带阻力训练对膝外翻年轻人的行走动力学和肌肉活动的影响。

方法

将42个年龄在22.5（2.7）岁的男性外翻成年男性与外翻随机分为两个实验组。干预组（n = 21）进行了为期14周的弹性带阻力训练。对照组在干预期间是被动的，在测试后接受相同的治疗。步行期间记录训练前后的地面反作用力和下肢肌肉活动。

发现

结果显示，干预组的峰值内侧地面反作用力和峰后时间有显着的逐组交互作用（p  <0.012； d = 0.83–3.76）。带有弹性带的阻力训练可显着提高峰值内侧地面反作用力（p  <0.001; d = 1.45）和更长的后峰值地面反作用力时间（p  <0.001; d = 1.85）。研究结果表明，积极积极时刻的峰值振幅之间存在显着的逐组交互作用，有利于干预组（p  <0.001； d = 1.18–2.02）。阻力训练导致较低的正自由力矩峰值峰值（p = 0.001；d = 1.46）。关于肌肉活动，分析显示，在推举阶段，股直肌和臀中肌活动之间存在显着的逐时交互作用，有利于干预组（p  <0.038； d = 0.68–0.89）。阻力训练可引起股直肌（p  = 0.038; d = 0.84）和臀肌（p  = 0.007; d = 0.54）活动。

解释

这项研究证明了在患有外翻性外翻障碍的男性成年人行走过程中，使用弹性带进行的阻力训练对动力学和肌肉活动的有效性。鉴于这种培训制度成本低廉，有效且易于管理，我们建议应将其实施为针对患有外翻的年轻成年人的康复或预防手段。