The Effect of Ground Tilt on the Lower Extremity Muscle Activity of Stroke
Patients Performing Squat Exercises |
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| Authors: | Kyog-Il Ki Jong-Duk Choi Hyuk-Shin Cho |
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| Institution: | 1) Department of Physical Therapy, Graduate School, Daejeon University, Republic of Korea;2) Department of Physical Therapy, College of Natural Science, Daejeon University, Republic of Korea;3) Department of Physical Therapy, Wonkwang Health Science University, Republic of Korea |
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| Abstract: | Purpose] The purpose of this study was to determine the effect of ground
tilt on the lower extremity muscle activity of stroke patients performing squat exercises.
Subjects] Fifteen hemiparetic patients volunteered to participate in this study.
Methods] The subjects performed squat exercises at three different ground tilt angles:
15° plantar flexion, a neutral position, and 15° dorsiflexion. A surface electromyogram
(sEMG) was used to record the electromyographic activities of the leg extensor muscle in
the vastus lateralis (VL), vastus medialis (VM), gastrocnemius lateralis (GL), and
gastrocnemius medialis (GM). The sEMG activity was analyzed using a one-way repeated
measures ANOVA and a post hoc Bonferroni correction. Results] The results of this study
are summarized as follows. Significant differences were noted for the VL and the GL when
the angle of the ankle joint was between the 15° plantar flexion and neutral positions
during squat exercises involving the VL and when the angle of the ankle joint was between
the neutral position and 15° dorsiflexion during squat exercises involving the VM.
Conclusion] In this study, sEMG showed that the VL and GL changed significantly during
squat exercises according to the ground tilt angle of hemiparetic patients. Therefore,
squat exercises with different ground tilt angles can be used to improve VL and GL
strength.Key words: Electromyogram, Hemiplegic patient, Squat exercises |
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