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KMID : 1211620130080040497
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Journal of the Korean Society of Physical Medicine
2013 Volume.8 No. 4 p.497 ~ p.503
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Activation of the Triceps Surae During Heel Raising Depend on the Knee Joint Flexion Angles
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권유정:Kwon Yu-Jeong
송민영:Song Min-Young
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Abstract
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PURPOSE : The purpose of this study was to investigate the change of triceps surae activation during heel raise test in
standing among knee flexion angles(0°, 30°, 45°,60°).
METHODS : Twenty healthy individuals performed unilateral plantarflexion in standing with 0°, 30°, 45°, 60° knee flexion. Activity of medial gastrocnemius(MG), lateral gastrocnemius(LG), soleus(Sol) was recorded with surface electromyography(EMG).
RESULT : The muscle activations induced the four different positions were compared and results showed that was significant difference MG and LG while the angle increase from 0° to 30°, 45°, 60° but Sol did not show significant ifferences in every angle.
CONCLUSION : This study suggest that 30° knee flexion is required to induce a significant mechanical disadvantage of gastrocnemius.
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KEYWORD
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Gastrocnemius, Soleus, Heel raising, Knee flexion angle
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