弹性阻力带运动方案对膝内翻年轻成人行走时动力学和肌肉活动的影响：一项双盲随机对照试验。
Effects of an elastic resistance band exercise program on kinetics and muscle activities during walking in young adults with genu valgus: A double-blinded randomized controlled trial.
机构信息
Department of Physical Education and Sport Sciences, University of Mohaghegh Ardabili, Ardabil, Iran.
Department of Physical Therapy Course, Federal University of Uberlândia, Minas Gerais, Brazil.
出版信息
Clin Biomech (Bristol). 2021 Jan;81:105215. doi: 10.1016/j.clinbiomech.2020.105215. Epub 2020 Nov 11.
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.
背景
本项双盲随机对照试验旨在探讨弹性带抗阻训练对膝内翻青年步行动力学和肌肉活动的影响。
方法
42 名 22.5(2.7)岁膝内翻的年轻男性被随机分配到两个实验组。干预组（n=21）进行了 14 周的弹性带抗阻训练。对照组在干预期间处于被动状态，并在完成测试后接受相同的治疗。在训练前后，记录行走时的地面反力和下肢肌肉活动。
结果
结果显示，组间-时间交互作用对于内侧峰值地面反力和后向峰值地面反力时间具有统计学意义（p<0.012；d=0.83-3.76），有利于干预组。使用弹性带进行抗阻训练可显著增加内侧峰值地面反力（p<0.001；d=1.45）和后向峰值地面反力时间（p<0.001；d=1.85）。研究结果显示，组间-时间交互作用对于正向自由力矩峰值幅度具有统计学意义，有利于干预组（p<0.001；d=1.18-2.02）。抗阻训练可降低正向自由力矩峰值幅度（p=0.001；d=1.46）。在肌肉活动方面，分析显示，在蹬离阶段，股直肌和臀中肌的活动存在组间-时间交互作用，有利于干预组（p<0.038；d=0.68-0.89）。抗阻训练可增加股直肌（p=0.038；d=0.84）和臀中肌（p=0.007；d=0.54）的活动。
结论
本研究证明了弹性带抗阻训练对膝内翻男性成人步行动力学和肌肉活动的有效性。鉴于这种训练方案成本低、效果好、易于管理，我们建议将其作为膝内翻青年的康复或预防手段。
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