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. 2025 Jul 18;20(7):e0328048.
doi: 10.1371/journal.pone.0328048. eCollection 2025.

Systematic review on biomechanical effects of high-velocity, low amplitude spinal manipulation

Anke Langenfeld  1 , Mirjam Baechler  2 , Jaap Swanenburg  1   3 , Malin Mühlemann  1 , Luana Nyirö  1   2 , Daniel Streuli  1 , Brigitte Wirth  1 , Petra Schweinhardt  1   2
Affiliations

Systematic review on biomechanical effects of high-velocity, low amplitude spinal manipulation

Anke Langenfeld et al. PLoS One. .

Abstract

Background: Spinal manipulative therapy uses high-velocity low-amplitude (HVLA) thrusts which are clinically effective, but underlying mechanisms are still unknown.

Objective: To summarize the evidence for biomechanical effects of HVLA thrusts in asymptomatic and symptomatic humans as well as for a possible link between biomechanical effects and clinical effectiveness.

Study design: Systematic review of randomized controlled trials.

Methods: An information specialist conducted systematic literature searches in six databases [Medline (OvidSP), Premedline (PubMed), CINAHL, EMBASE, Cochrane, and Biosis]. Studies were selected by two authors and classified using the revised Cochrane risk-of-bias tool for randomized trials (RoB 2). Results were qualitatively summarized per biomechanical output [range of motion (ROM) according to the spinal region where HVLA thrusts were applied, facet joint gapping, and spinal stiffness].

Results: The thirty-three included studies were heterogeneous regarding participant characteristics, intervention frequency and outcomes. Twenty-seven studies reported on the effects of HVLA thrusts on spinal ROM. There is evidence increased cervical ROM following cervical HVLA thrusts on cervical ROM [9/15 studies with a positive treatment effect (5 low risk of bias/4 some concern) and increased cervical ROM following thoracic HVLA thrusts [8/8 studies (4 low risk of bias/4 some concern)]. The effects of a thoracic and lumbar HVLA thrusts on the respective ROM were less clear. Three (2 low risk/1 some concern) studies on facet joint gapping showed increased gapping following HVLA thrusts compared to side-posture positioning, and a single study (some concern) on spinal stiffness showed no effect of HVLA thrusts. Only one study (some concern) linked the biomechanical to clinical outcomes.

Conclusion: HVLA thrusts, either applied to the cervical or the thoracic spine, appear to increase cervical ROM, based on studies with low risk and studies with some concern regarding risk of bias. For all other outcomes, the included studies were too heterogeneous and too few to draw any sound conclusion. Future studies on the biomechanical effects of HVLA thrusts should link the biomechanical to clinical outcomes such as pain and disability.

Prospero registration: CRD42018096963.

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Conflict of interest statement

The authors have declared that no competing interest exist.

Figures

Fig 1
Fig 1. Prisma flow diagram for the whole study including searches 2018, 2020, 2023 and 2024.
Fig 2
Fig 2. Results of the quality assessment using the RoB 2 tool including studies with low risk and some concerns [high-risk studies excluded].
See this image and copyright information in PMC

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