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. 2013 Dec;25(12):1569-73.
doi: 10.1589/jpts.25.1569. Epub 2014 Jan 8.

Chronic Low Back Pain in Women: Muscle Activation during Task Performance

Fernanda G Santos  1 , Carolina M Carmo  1 , América C Fracini  1 , Rita R P Pereira  1 , Kelly S Takara  1 , Clarice Tanaka  1
Affiliations

Chronic Low Back Pain in Women: Muscle Activation during Task Performance

Fernanda G Santos et al. J Phys Ther Sci. 2013 Dec.

Abstract

[Purpose] The aim of this study was to compare the activities of the trunk and hip muscles in chronic low back pain (CLBP) women and asymptomatic subjects during the kneeling to half-kneeling task. [Subjects] Twenty-nine CLBP women and thirty asymptomatic subjects (C) participated in this study. [Methods] Electromyography activity (EMG) of the obliquus internus abdominis (OI), the lumbar erector spinae (LES) and the gluteus medius (GM) muscles was recorded bilaterally. The peak amplitude, the time of peak amplitude and the integrated linear envelope EMG for each muscle were obtained. [Results] The C group bilateral OI and GM muscles displayed higher peak amplitudes and earlier times of peak amplitude. They also had higher integrated linear envelope EMG values. The CLBP group bilateral LES muscles had higher peak amplitudes and earlier times of peak amplitude. They also showed an increased integrated linear envelope EMG values. [Conclusion] The CLBP women activate the LES muscles in the kneeling to half-kneeling task, showing different patterns of motor planning activity.

Keywords: Abdominal muscles; Low back pain; Postural balance.

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