Electromyographic Analysis of Lower Extremities during Nordic hamastrins exercise

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  • ノルディックハムストリングスエクササイズにおける下肢筋の筋電図学的分析
  • ノルディックハムストリングスエクササイズ ニ オケル カシキン ノ キンデンズガクテキ ブンセキ

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The purpose of study was to determine the effect of two ankle potion and to compare between to change knee angle during Nordic hamstrings exercise (NH) on the muscle activity of the lower extremities. Eight healthy subjects (mean age 22.6±2.9 years) participated in this study. Electromyographic activity during NH was measured in the rectus femoris, semitendinosus, biceps femoris, gastrocnemius medialis, gastrocnemius lateralis, soleus, tibialis anterior. NH was performed under the following two ankle psition, i.e.ankle dorsiflexion 0°angle and ankle plantarflexion maximum angle. Muscle activity of semitendinosus, biceps femoris, soleus was significantly greater at 70°～60°knee angle. Muscle activity of gastrocnemius medialis, gastrocnemius lateralis, tibialis anterior was significantly greater at 60°～50°knee angle. Muscle activity of semitendinosus and soleus was significantly greater at ankle plantarflexion maximum angle than ankle dorsiflexion 0°angle. the contrary, Muscle activity of tibialis anterior was significantly greater at ankle dorsiflexion 0°angle.

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