Department of Physical Medicine and Rehabilitation, Central Finland Central Hospital, Jyväskylä, Finland.
Department of Orthopaedics and Sports Medicine, Erasmus MC, University Medical Centre, Rotterdam, the Netherlands; Aspetar Sports Groin Pain Centre, Aspetar Orthopaedic and Sports Hospital, Doha, Qatar; Sport Medicine and Exercise Clinic Haarlem (SBK), Haarlem, the Netherlands.
J Electromyogr Kinesiol. 2021 Apr;57:102528. doi: 10.1016/j.jelekin.2021.102528. Epub 2021 Jan 28.
To evaluate the activity of knee stabilizing muscles while using custom-made biomechanical footwear (BF) and to compare it when walking barefoot and with a knee brace (Unloader®).
Seventeen healthy working-aged (mean age: 29 years; standard deviation: 8 years) individuals participated. The knee brace was worn on the right knee and BF in both legs. Surface electromyography (sEMG) data was recorded bilaterally from vastus medialis (VM), semitendinosus (ST), tibialis anterior (TA) and lateral gastrocnemius (LG) muscles during walking, and repeated-measures ANOVA with a post-hoc t-test was used to determine differences between the different walking modalities (barefoot, brace and BF).
Averaged sEMG was significantly higher when walking with BF than barefoot or knee brace in the ST muscles, in the right LG, and left TA muscle. It was significantly lower when walking with the brace compared to barefoot in the right ST and LG muscles, and left TA muscle. Analysis of the ensemble-averaged sEMG profiles showed earlier activation of TA muscles when walking with BF compared to other walking modalities.
BF produced greater activation in evaluated lower leg muscles compared to barefoot walking. Thus BF may have an exercise effect in rehabilitation and further studies about its effectiveness are warranted.
评估使用定制生物力学鞋（BF）时膝关节稳定肌的活动情况，并将其与赤脚和佩戴膝关节支具（Unloader®）行走时进行比较。
17 名健康的成年工作者（平均年龄：29 岁；标准差：8 岁）参与了研究。右膝佩戴膝关节支具，双腿均佩戴 BF。在行走过程中，双侧记录股四头肌（VM）、半腱肌（ST）、胫骨前肌（TA）和外侧腓肠肌（LG）的表面肌电图（sEMG）数据。采用重复测量方差分析和事后 t 检验来确定不同行走方式（赤脚、支具和 BF）之间的差异。
与赤脚或膝关节支具相比，佩戴 BF 行走时 ST 肌肉、右 LG 肌肉和左 TA 肌肉的平均 sEMG 显著更高。与赤脚相比，佩戴支具行走时，右 ST 和 LG 肌肉以及左 TA 肌肉的 sEMG 显著更低。对集平均 sEMG 图谱的分析表明，佩戴 BF 行走时 TA 肌肉的激活更早。
与赤脚行走相比，BF 使评估的小腿肌肉产生更大的激活。因此，BF 可能在康复中具有锻炼效果，需要进一步研究其有效性。
