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Work of a Couple Moment01:12

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Related Experiment Video

Updated: Jun 25, 2026

Methods to Quantify Pharmacologically Induced Alterations in Motor Function in Human Incomplete SCI
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Changes in mechanical work during treadmill-induced asymmetric walking.

Samantha K Price1, Jill S Higginson2, Nadia R Khoury3

  • 1Department of Physical Therapy and Athletic Training, Saint Louis University, 3437 Caroline St, St. Louis, MO 63104, United States; Department of Physical Medicine and Rehabilitation, Cleveland Clinic, 9500 Euclid Ave. Cleveland, OH 44195, United States.

Journal of Biomechanics
|June 21, 2025
PubMed
Summary

Increasing walking asymmetry alters mechanical costs in healthy adults, with the fast limb becoming more efficient and the slow limb less efficient. Joint-level work distribution remained largely unchanged.

Keywords:
GaitJoint mechanicsWork

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Area of Science:

  • Biomechanics
  • Human Movement Science
  • Kinesiology

Background:

  • Asymmetric walking is prevalent in both healthy and clinical populations.
  • Significant walking asymmetry can negatively impact physical function and mobility.
  • Mechanical work changes are a key factor in how walking asymmetry affects physical function.

Purpose of the Study:

  • To investigate the effects of increasing walking asymmetry on limb- and joint-level mechanical work.
  • To quantify changes in mechanical work distribution during induced asymmetric walking.

Main Methods:

  • Ten healthy participants walked on a split-belt treadmill under varying degrees of asymmetry (0%, 10%, 25%, 50% speed difference).
  • Limb and joint mechanical work were calculated, and relative work distribution was visualized using pie charts.
  • A 2x4 repeated measures ANOVA analyzed the effect of asymmetry on mechanical cost of transport (CoT).

Main Results:

  • A significant limb-by-condition interaction was observed (p < 0.0001).
  • Cost of transport (CoT) decreased in the faster limb and increased in the slower limb as asymmetry intensified.
  • The distribution of mechanical work at the joint/segment level showed minimal changes across different walking conditions.

Conclusions:

  • Induced asymmetric walking in healthy adults modifies overall mechanical costs.
  • Joint and segment-level compensations appear minimally affected by increased walking asymmetry.
  • Further research is recommended to explore these effects in individuals with pathological conditions.