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Related Experiment Videos

Spinal load changes during rotatory dynamic sitting.

M Lengsfeld1, D L van Deursen, A Rohlmann

  • 1Department of Orthopaedic Surgery, Philipps-University of Marburg, 35033 Marburg, Baldingerstrasse, Germany. lengsfel@post.med.uni-marburg.de

Clinical Biomechanics (Bristol, Avon)
|February 17, 2000
PubMed
Summary
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Dynamic sitting in a novel rotatory chair causes measurable changes in lumbar spine forces and moments. This innovative seating may enhance disc nutrition and help prevent low back pain.

Area of Science:

  • Biomechanics
  • Spinal health
  • Ergonomics

Background:

  • A novel chair concept with dynamic rotational stimuli in the seat plane was developed.
  • Understanding the biomechanical effects of such chairs on the spine is crucial.

Purpose of the Study:

  • To quantify the load and moment alterations on the lumbar spine during rotatory sitting.
  • To assess the impact of a dynamic rotatory chair on spinal biomechanics.

Main Methods:

  • In vivo telemetric measurements of spinal load and moment changes.
  • Utilized a spinal fixator device for precise data acquisition.

Main Results:

  • Rotatory sitting at 0.22 Hz with 1.8-degree amplitude induced axial force changes of 23 N.

Related Experiment Videos

  • Maximum bending moment changes recorded were 0.52 Nm.

    • Conclusions:

    • Dynamic sitting induces lumbar spine force and moment variations, potentially due to muscular adaptation.
    • The rotatory chair concept shows promise for improving disc nutrition and preventing low back pain.