The response of the Transverse Abdominis and Internal Oblique muscles to different postures

Anne-Marie Ainscough-Potts, Matthew Morrissey, Duncan Critchley

Research output: Contribution to journalArticlepeer-review

90 Citations (Scopus)

Abstract

The purpose of this study was to consider how the deep abdominal muscles responded to alterations in seated stability. The thickness of the right transverse abdominis (TrA) and internal oblique (IO) muscles were measured with ultrasound imaging in 30 healthy human subjects (mean age 27.7, years 22 females) in supine lying, relaxed sitting on a chair with both feet on the ground, relaxed sitting on a gym ball with both feet on the ground and sitting on a gym ball lifting the left foot off the floor. Measurements were taken at the end of both inspiration and expiration. The results showed that muscle thickness expressed as a percentage of the actual muscle thickness in supine lying did not differ between relaxed sitting on a chair and sitting on a gym ball for either muscle (P=0.012–0.054) where Bonferroni corrected P-value for significance=0.002. Raising the foot off the floor produced a significant increase in thickness for TrA and IO, when compared with the other seated postures (P
Original languageEnglish
Pages (from-to)54 - 60
Number of pages7
JournalManual Therapy
Volume11
Issue number1
DOIs
Publication statusPublished - Feb 2006

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