The effect of lumbar posture on abdominal muscle thickness during an isometric leg task in people with and without non-specific low back pain

Rafael Zambelli Pinto*, Paulo Henrique Ferreira, Marcia Rodrigues Franco, Mariana Calais Ferreira, Manuela Loureiro Ferreira, Luci Fuscaldi Teixeira-Salmela, Vinicius C. Oliveira, Christopher Maher

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

This study investigated the effect of lumbar posture on function of transversus abdominis (TrA) and obliquus internus (OI) in people with and without non-specific low back pain (LBP) during a lower limb task. Rehabilitative ultrasound was used to measure thickness change of TrA and OI during a lower limb task that challenged the stability of the spine. Measures were taken in supine in neutral and flexed lumbar postures in 30 patients and 30 healthy subjects. Data were analysed using a two-way (groups, postures) ANOVA. Our results showed that lumbar posture influenced percent thickness change of the TRA muscle but not for OI. An interaction between group and posture was found for TrA thickness change (F 1,56 = 6.818, p = 0.012). For this muscle, only healthy participants showed greater thickness change with neutral posture compared to flexed (mean difference = 6.2%; 95% CI: 3.1-9.3%; p < 0.001). Comparisons between groups for both muscles were not significant. Neutral lumbar posture can facilitate an increase in thickness of the TrA muscle while performing a leg task, however this effect was not observed for this muscle in patients with LBP. No significant difference in TrA and OI thickness change between people with and without non-specific LBP was found.

Original languageEnglish
Pages (from-to)578-584
Number of pages7
JournalManual Therapy
Volume16
Issue number6
DOIs
Publication statusPublished - Dec 2011
Externally publishedYes

Keywords

  • Abdominal muscles
  • Low back pain
  • Lumbar spine
  • Ultrasonography

Fingerprint Dive into the research topics of 'The effect of lumbar posture on abdominal muscle thickness during an isometric leg task in people with and without non-specific low back pain'. Together they form a unique fingerprint.

Cite this