Comparison of Contraction Rates of Abdominal Muscles of Chronic Low Back Pain Patients in Different Postures

Overview

Journal J Phys Ther Sci

Date 2013 Nov 22

PMID 24259882

Citations 3

Authors

Sung-Hak Cho

Kang Hoon Kim

Il-Hun Baek

Bong-Oh Goo

Affiliations

Soon will be listed here.

Abstract

[Purpose] This study examined the contraction rates of abdominal muscles in relation to the posture of chronic lumbar pain patients and normal subjects. [Subjects] The subjects were 17 chronic low back pain (CLBP) patients and 17 normal people between the ages of 20 and 59. [Methods] Experimental postures included a supine position, a sitting position, and a standing position. Measurements were taken at rest and during abdominal contraction. The measurement at rest was taken during expiration with comfortable breathing, and the measurement during contraction was taken at maximum expiration of forced expiration. Muscle contraction rates (on contraction and at relaxation) were calculated. [Results] There were significant differences between CLBP patients and normal subjects in the transversus abdominis (TrA) in the standing position. [Conclusion] Changes in contraction rates of the abdominal muscles of normal subjects and CLBP patients were examined in different postures at maximum expiration. It was found that the contraction rate of TrA in CLBP patients in a standing position, is significantly lower than that of normal subjects.

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