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

Dept. of Physical Therapy, College Biomedical Science and Engineering, Inje University PurposeThe 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. MethodsTwenty 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.ResultsMuscle activity of Gmed was significantly higher in PBFU and in PB than in PHA (p .05). Muscle activity of the QL was significantly lower in PB than in PHA(p .05).