Effects of posture on the thickness of transversus abdominis in pain-free subjects

Reeve, Angelica and Dilley, Andrew (2009) Effects of posture on the thickness of transversus abdominis in pain-free subjects. Manual Therapy, 14 (6). pp. 679-684. ISSN 1532-2769

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The role of transversus abdominis (TrA) on spinal stability may be important in low back pain (LBP). To date, there have not been any investigations into the influence of lumbo-pelvic neutral posture on TrA activity. The present study therefore examines whether posture influences TrA thickness. A normative within-subjects single-group study was carried out. Twenty healthy adults were recruited and taught five postures: (1) supine lying; (2) erect sitting (lumbo-pelvic neutral); (3) slouched sitting; (4) erect standing (lumbo-pelvic neutral); (5) sway-back standing. In each position, TrA thickness was measured (as an indirect measure of muscle activity) using ultrasound. In erect standing, TrA (mean TrA thickness: 4.63±1.35mm) was significantly thicker than in sway-back standing (mean TrA thickness: 3.32±0.95mm) (p=00001). Similarly, in erect sitting TrA (mean thickness=4.30mm±1.58mm) was found to be significantly thicker than in slouched sitting (mean thickness=3.46mm±1.13mm) (p=0002). In conclusion, lumbo-pelvic neutral postures may have a positive influence on spinal stability compared to equivalent poor postures (slouched sitting and sway-back standing) through the recruitment of TrA. Therefore, posture may be important for rehabilitation in patients with LBP.

Item Type: Article
Keywords: Posture; Transversus abdominis; Spinal stability
Schools and Departments: Brighton and Sussex Medical School > Clinical and Experimental Medicine
Brighton and Sussex Medical School > Division of Medical Education
Subjects: R Medicine
Depositing User: Ellen Thomas
Date Deposited: 01 Nov 2012 09:27
Last Modified: 25 Sep 2017 09:07
URI: http://sro.sussex.ac.uk/id/eprint/41077
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