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KMID : 1211620110060030323
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Journal of the Korean Society of Physical Medicine
2011 Volume.6 No. 3 p.323 ~ p.330
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The Effects of Using a Pressure Bio-feedback Unit and a Pelvic Belt on Selective Muscle Activity in the Hip Abductor during Hip Abduction Exercise
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Lee Dong-Kyu
Moon Se-Na
Noh Kyung-Hee
Park Kyung-Hee
Kim Tae-Ho
Oh Jae-Seop
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Abstract
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Purpose: The purpose of this study was to examine the effects of using a pressure bio-feedback unit (PBFU) and a pelvic belt (PB) on the electromyographic (EMG) signal amplitude of the gluteus medius (Gmed) and the quadratus lumborum (QL) during hip abduction exercise when lying on the side.
Methods: Twenty able-bodied volunteers (10 male, 10 female) were recruited for this study. The EMG signal amplitude was randomly measured during hip abduction with preferred hip abduction (PHA), with PBFU, and with PB. The surface EMG signal was recorded from the Gmed and the QL. Data were analyzed using a one-way repeated ANOVA.
Results: Muscle activity of Gmed was significantly higher in PBFU and in PB than in PHA (p<.05). There were no significant difference between PBFU and PB(p>.05). Muscle activity of the QL was significantly lower in PB than in PHA(p<.05). The Gmed/QL muscle activity ratio was also significantly higher in PBFU and in PB than in PHA(p<.05), with no significant difference between PBFU and PB (p>.05).
Conclusion: Based on these findings, using a PBFU and a PB is an effective method to disassociate QL use from Gmed use during hip abduction exercises when lying on the side.
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KEYWORD
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Gluteus medius, Pelvic belt, Press Bio-feedback Unit, Quadratus lumborum
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