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KMID : 1142420190170010093
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PNF and Movement
2019 Volume.17 No. 1 p.93 ~ p.101
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A Study on the Characteristics of Lower Extremity Muscle Activation according to the Variable Weight Shift on the Affected Side in Hemiplegic Patients
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Kim Kyung-Hwan
Park Sung-Hun
Pak Noh-Wook
Lee Hye-Jin
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Abstract
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Purpose: This study aimed to investigate lower extremity muscle activation to the variable weight shift on the affected side of patients with hemiplegia.
Methods: Eighteen patients with chronic hemiplegia volunteered to participate in this study. All participants performed three types of weight shift (sideways, forward, and backward) in limits of stability on the affected side. Muscle activation in a paralyzed leg was measured with electromyography on the gluteus medius, tensor fasciae latae, rectus femoris, and biceps femoris; furthermore, the attached area was recommended by SENIAM projects. Each weight shift was performed three times, and then the mean value of the three measurements was analyzed. The data were analyzed by measuring the symmetrically standing position with the reference voluntary contraction (RVC) and was standardized with the percentage of RVC method.
Results: No significant difference in lower extremity muscle activation occurred according to the three types of variable weight shift. However, significant differences in lower extremity muscle activation did occur with each weight shift position. In addition, activation increased at the rectus femoris and decreased at the gluteus medius and tensor fasciae latae.
Conclusion: Hip abductor muscle strength training and variable weight shifts on the affected side must increase to improve patients’balance and limits of stability.
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KEYWORD
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Hemiplegia, Weight shift, EMG, Lower extremity
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