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. 2024 Jun;33(6):2380-2394.
doi: 10.1007/s00586-024-08205-w. Epub 2024 Mar 14.

Poor lumbar spine coordination in acute low back pain predicts persistent long-term pain and disability

Mansour Abdullah Alshehri  1   2 , Wolbert van den Hoorn  1   3 , David M Klyne  1 , Jaap H van Dieën  4 , Jacek Cholewicki  5   6 , Paul W Hodges  7
Affiliations

Poor lumbar spine coordination in acute low back pain predicts persistent long-term pain and disability

Mansour Abdullah Alshehri et al. Eur Spine J. 2024 Jun.

Abstract

Purpose: Sitting balance on an unstable surface requires coordinated out-of-phase lumbar spine and provides sufficient challenge to expose quality of spine control. We investigated whether the quality of spine coordination to maintain balance in acute low back pain (LBP) predicts recovery at 6 months.

Methods: Participants in an acute LBP episode (n = 94) underwent assessment of sitting balance on an unstable surface. Seat, hip and spine (lower lumbar, lumbar, upper lumbar, thoracic) angular motion and force plate data were recorded. Coordination between the seat and hip/spine segments to maintain balance was quantified in the frequency domain to evaluate coordination (coherence) and relative timing (phase angle: in-phase [segments move together]; out-of-phase [segments move opposite]). Center of pressure (CoP) and upper thorax motion assessed overall balance performance. Hip and spine coordination with the seat were compared between those who did not recover (increased/unchanged pain/disability), partially recovered (reduced pain/disability) or recovered (no pain and disability) at 6 months.

Results: In both planes, coherence between the seat and lower lumbar spine was lower (and in-phase-unhelpful for balance) at baseline in those who did not recover than those who recovered. Coherence between the seat and hip was higher in partially recovered in both planes, suggesting compensation by the hip. LBP groups had equal overall balance performance (CoP, upper thorax motion), but non-recovery groups used a less optimal strategy that might have consequences for long-term spine health.

Conclusion: These longitudinal data revealed that individuals with compromised contribution of the lumbar spine to the balance during unstable sitting during acute LBP are less likely to recover.

Keywords: Coordination; Low back pain; Lumbar spine; Postural control; Risk factors.

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