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Journal of the Korean Academy of Rehabilitation Medicine 2000;24(5):977-980.
The Effect of Chronic Low Back Pain on Bone Mineral Density and Trunk Muscle Strength in Women.
Bak, Joon Yong , Ha, Sang Bae
Department of Rehabilitation Medicine, College of Medicine, University of Ulsan.
만성 요통이 여성의 골밀도와 체간근력에 미치는 영향
박준용, 하상배
울산대학교 의과대학 재활의학교실

To evaluate (1) the effect of chronic low back pain on bone mineral density, and (2) the effect of chronic low back pain on trunk muscle strength in women.

Subjects were 118 women patients (ages of 28∼65 years) suffering from chronic low back pain more than three months and control groups were 218 healthy women (age of 26∼72 years). We measured bone mineral density (BMD) at the lumbar spine and proximal femur using Dual X-ray absorptiometry and trunk muscle strength using Cybex 660 dynamometer.

There was no significant difference between groups in lumbar spine BMD, in proximal femur BMD, or in trunk flexor muscle strength. However, trunk extensor muscle strength was reduced significantly in patient group. Trunk extensor muscle peak torque was 64.69⁑18.48 Nm in the patient group and 73.84⁑22.50 Nm in the control group in 30o/sec, and 58.65⁑18.59 Nm in the patient group and 65.68⁑20.28 Nm in the control group in 60o/sec.

The results suggest that chronic low back pain does not affect the BMD. However, it causes trunk extensor muscle weakness; therefore, trunk extension exercise will be help to the patients with chronic low back pain.

Key Words: Back pain, Bone mineral density, Trunk muscle strength


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