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Experimental Methods to Study Human Postural Control
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Is angular momentum in the horizontal plane during gait a controlled variable?

Valerie Thielemans1, Pieter Meyns1, Sjoerd M Bruijn2

  • 1Department of Kinesiology, KU Leuven, Belgium.

Human Movement Science
|April 8, 2014
PubMed
Summary
This summary is machine-generated.

Human gait doesn't always minimize horizontal angular momentum. While adding weights controlled angular momentum, faster speeds and longer steps increased it, suggesting gait control varies.

Keywords:
Angular momentumArm swingGait analysisInterlimb coordinationLoad

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Area of Science:

  • Biomechanics
  • Human Locomotion
  • Kinetic Analysis

Background:

  • Previous research suggests horizontal angular momentum during human gait is actively controlled and minimized.
  • However, empirical evidence under explicit manipulation of segmental angular momentum is lacking.

Purpose of the Study:

  • To investigate the control of horizontal angular momentum during human gait under various experimental conditions.
  • To determine if angular momentum is strictly controlled across different gait parameters.

Main Methods:

  • Twelve participants walked under 17 conditions, manipulating arm or leg angular momentum.
  • Conditions included varied step lengths, walking speeds, and added limb weights (wrist or ankle).
  • Gait kinematics were used to calculate angular momentum for the total body, arms, and legs.

Main Results:

  • Increased step length led to higher total body and leg angular momentum.
  • Added limb weights caused opposing changes in arm and leg angular momentum, maintaining stable total body angular momentum.
  • Increased walking speed resulted in elevated arm, leg, and total body angular momentum.

Conclusions:

  • Horizontal angular momentum in human gait is not consistently minimized.
  • Control appears condition-dependent, evident when external perturbations (added weights) are introduced.
  • Gait parameters like speed and step length can increase angular momentum, indicating a lack of strict control in all scenarios.