title: The effect of hip abductor exercise on muscle strength and trunk stability after an injury of the lower extremities.
abstract: [Purpose] The gluteus medius, a hip abductor, controls femoral movement and stabilizes the pelvis during lower extremity mobilization. [Subjects] This study enrolled 24 subjects into control and experimental groups. [Methods] This randomized controlled study included patients who underwent arthroscopy after meniscus injury and started a rehabilitative exercise program 8 weeks after surgery. Subjects were divided into the experimental gluteus medius resistance exercise group (n=12) and the control group (n=12). The study investigated muscle strength and balance of the flexors, extensors, and abductors of the knee for 8 weeks. [Results] Strengths of knee extensors in patients who underwent rehabilitative exercise for 8 weeks were measured. Strength of the knee extensors of the experimental and control groups increased by 40% and 31%, respectively; strength of the hip flexors of the experimental and control groups increased by 31% and 18%, respectively. Strength of the hip joint muscles showed a 40% increase in the experimental group and a 14% increase in the control group. However, there was a significant difference (18%) in muscle strength of the hip abductors between the groups. Measurements of trunk lateral flexion showed a difference within a group, but no intergroup difference was found. [Conclusion] This study investigated the effect of hip abductor exercise on muscular strength and trunk stability in patients with a meniscus injury.
authors.affiliation: Department of Physical Therapy, College of Rehabilitation Science, Daegu University: 201 Daegudae street, Gyeongsan-si, Kyeongbuk 712-714, Republic of Korea.
authors.forename: Hwang-Bo
authors.initials: HB
authors.lastname: Kak
authors.affiliation: Department of Physical Therapy, College of Rehabilitation Science, Daegu University: 201 Daegudae street, Gyeongsan-si, Kyeongbuk 712-714, Republic of Korea.
authors.forename: Sun-Ja
authors.initials: SJ
authors.lastname: Park
authors.affiliation: Department of Physical Therapy, Catholic University of Daegu, Republic of Korea.
authors.forename: Byun-Joon
authors.initials: BJ
authors.lastname: Park
keywords: Arthroscopy; Gluteus medius; Trunk lateral flexion