title: Effects of isometric exercise using biofeedback on maximum voluntary isometric contraction, pain, and muscle thickness in patients with knee osteoarthritis.
abstract: [Purpose] The purpose of our study was to investigate the effects of isometric exercises using electromyographic biofeedback (EMGBF) and ultrasound biofeedback (USBF) on maximum voluntary isometric contraction (MVIC), pain assessed by the Visual Analogue Scale (VAS), and vastus medialis oblique (VMO) thickness in patients with knee osteoarthritis (OA). [Subjects and Methods] Thirty females over 65 years of age who had been diagnosed with knee osteoarthritis were recruited and randomly assigned to three groups, each comprising of 10 subjects. The Subjects in the EMGBF training and USBF training groups were trained with the corresponding physical training exercise program targeting the vastus medialis oblique, whereas the subjects in the control group were treated with conventional physical therapies, such as a hot pack, ultrasound, and transcutaneous electrical nerve stimulation. Subjects in each group were trained or treated for 20 min, 3 times a week for 8 weeks. [Results] The MVIC in the EMGBF and USBF training groups was significantly increased compared with that in the control group, and the VAS score (for measurement of pain) in the EMGBF and USBF training groups was significantly decreased compared with that in the control group. Only the EMGBF training group showed a significantly increased VMO thickness compared with before training. [Conclusion] These results suggest that USBF training is similar to EMGBF training in terms of its effectiveness and is helpful for treating patients with knee OA.
authors: Segyero Hospital, Republic of Korea ; Department of Physical Therapy, International University of Korea, Republic of Korea.
authors: Yun Lak
authors: YL
authors: Choi
authors: Department of Physical Therapy, International University of Korea, Republic of Korea.
authors: Bo Kyung
authors: BK
authors: Kim
authors: Department of Pharmaceutical Engineering, International University of Korea, Republic of Korea.
authors: Yong Pil
authors: YP
authors: Hwang
authors: Department of Physical Therapy, Howon University, Republic of Korea.
authors: Ok Kon
authors: OK
authors: Moon
authors: Department of Physical Therapy, International University of Korea, Republic of Korea.
authors: Wan Suk
authors: WS
authors: Choi
keywords: Conventional physical therapy; Electromyographic biofeedback; Ultrasound biofeedback
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