title: The Influence of Dual Pressure Biofeedback Units on Pelvic Rotation and Abdominal Muscle Activity during the Active Straight Leg Raise in Women with Chronic Lower Back Pain.
abstract: [Purpose] This study was performed to assess the influence of applying dual pressure biofeedback units (DPBUs) on the angle of pelvic rotation and abdominal muscle activity during the active straight leg raise (ASLR). [Subjects] Seventeen patients with low-back pain (LBP) participated in this study. [Methods] The subjects were asked to perform an active straight leg raise (ASLR) without a PBU, with a single PBU, and with DPBUs. The angles of pelvic rotation were measured using a three-dimensional motion-analysis system, and the muscle activity of the bilateral internal oblique abdominis (IO), external oblique abdominis (EO), and rectus abdominis (RA) was recorded using surface electromyography (EMG). One-way repeated-measures ANOVA was performed to determine the rotation angles and muscle activity under the three conditions. [Results] The EMG activity of the ipsilateral IO, contralateral EO, and bilateral RA was greater and pelvic rotation was lower with the DPBUs than with no PBU or a single PBU. [Conclusion] The results of this study suggest that applying DPBUs during ASLR is effective in decreasing unwanted pelvic rotation and increasing abdominal muscle activity in women with chronic low back pain.
authors.affiliation: Department of Rehabilitation Science, Graduate School, Inje University, Republic of Korea.
authors.forename: Kyung-Hee
authors.initials: KH
authors.lastname: Noh
authors.affiliation: Department of Physical Therapy, Nambu University, Republic of Korea.
authors.forename: Ji-Won
authors.initials: JW
authors.lastname: Kim
authors.affiliation: Department of Physical Therapy, Baekseok University, Republic of Korea.
authors.forename: Gyoung-Mo
authors.initials: GM
authors.lastname: Kim
authors.affiliation: Department of Physical Therapy, Sangji University, Republic of Korea.
authors.forename: Sung-Min
authors.initials: SM
authors.lastname: Ha
authors.affiliation: Department of Physical Therapy, College of Biomedical Science and Engineering, Inje University: 607 Obang-dong, Gimhae-si, Gyeongsangnam-do 621-749, Republic of Korea.
authors.forename: Jae-Seop
authors.initials: JS
authors.lastname: Oh
keywords: Active straight leg raise; Pelvic rotation; Pressure biofeedback unit