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Increased Trunk Kinetics Observed During Dose-Specific Trunk Lean Gait Modification.

Oladipo Eddo1, João R Vaz2, Jaime Ludwick1

  • 1George Mason University.

Journal of Applied Biomechanics
|August 24, 2021
PubMed
Summary
This summary is machine-generated.

Altering trunk lean during walking increases trunk moments and spinal loading in healthy individuals. These trunk modifications, even when modest, may lead to unintended kinetic chain changes.

Keywords:
gait retrainingknee abductor momentspinal flexionspinal loadtrunk modification

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Area of Science:

  • Biomechanics
  • Human Movement Science
  • Orthopedics

Background:

  • Trunk modification can reduce knee abduction moments in healthy individuals and those with knee osteoarthritis.
  • Changes in trunk kinematics during walking are linked to increased trunk moments.

Purpose of the Study:

  • To examine how dose-specific lateral trunk lean affects trunk kinetics.
  • Investigate trunk kinetics during both ipsilateral and contralateral stance phases.

Main Methods:

  • Nineteen healthy participants performed walking trials with and without lateral trunk lean.
  • Real-time biofeedback guided trunk angle modifications (small and large magnitudes).
  • Repeated-measures ANOVA or Friedman test analyzed trunk kinetics.

Main Results:

  • Trunk kinetics significantly increased with even modest trunk angle modifications.
  • Peak frontal plane trunk moment and angular impulse rose during ipsilateral stance.
  • Increased peak lateral joint reaction force suggests spinal loading compromise.

Conclusions:

  • Lateral trunk lean significantly alters trunk kinetics and spinal loading.
  • Implementing trunk modifications may cause secondary kinetic chain effects.
  • Further research is needed to understand these unintended consequences.