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Related Experiment Video

Updated: Jun 1, 2026

Lower-Limb Biomechanical Characteristics Associated with Unplanned Gait Termination Under Different Walking Speeds
05:52

Lower-Limb Biomechanical Characteristics Associated with Unplanned Gait Termination Under Different Walking Speeds

Published on: August 25, 2020

Optimal walking speed following changes in limb geometry.

Françoise Leurs1, Yuri P Ivanenko, Ana Bengoetxea

  • 1Laboratory of Neurophysiology and Movement Biomechanics CP601, Université Libre de Bruxelles, 1070 Brussels, Belgium.

The Journal of Experimental Biology
|June 10, 2011
PubMed
Summary
This summary is machine-generated.

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Human walking speed optimization is influenced by limb geometry, not just length. Walking on stilts altered kinematic patterns and shifted the optimal Froude number (Fr) for metabolic energy efficiency.

Area of Science:

  • Biomechanics
  • Human locomotion
  • Energetics

Background:

  • Dynamic similarity suggests optimal walking speeds are size-independent when normalized by the Froude number (Fr).
  • Previous studies show a consistent Fr of ~0.25 for optimal speed across diverse animal limb geometries.

Purpose of the Study:

  • To investigate if human optimal walking speed depends solely on limb length or if limb segment proportions are crucial.
  • To test if walking on stilts, which alters limb proportions, results in a faster optimal speed and lower metabolic cost.

Main Methods:

  • Compared kinematics, electromyography, and oxygen consumption in adults walking with and without stilts.
  • Artificially elongated the shank segment by 40 cm using articulated stilts.
  • Analyzed data across various walking speeds on a treadmill.

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Related Experiment Videos

Last Updated: Jun 1, 2026

Lower-Limb Biomechanical Characteristics Associated with Unplanned Gait Termination Under Different Walking Speeds
05:52

Lower-Limb Biomechanical Characteristics Associated with Unplanned Gait Termination Under Different Walking Speeds

Published on: August 25, 2020

Using a Split-belt Treadmill to Evaluate Generalization of Human Locomotor Adaptation
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Using a Split-belt Treadmill to Evaluate Generalization of Human Locomotor Adaptation

Published on: August 23, 2017

Influence of Step-Width Manipulation on Running Biomechanics
06:53

Influence of Step-Width Manipulation on Running Biomechanics

Published on: February 28, 2025

Main Results:

  • Walking on stilts induced significant non-linear changes in kinematic and electromyography patterns.
  • Observed increased proximal flexor-extensor activity during the swing phase, with shorter normalized stride lengths.
  • Minimal metabolic cost per unit distance with stilts occurred at a lower Froude number (Fr ~0.17) compared to normal walking (Fr ~0.25).

Conclusions:

  • Limb geometry plays a significant role in optimizing human walking speed.
  • Kinematic coordination strategies are essential for minimizing energy expenditure during locomotion.
  • Findings challenge the sole reliance on total limb length for predicting optimal walking speeds.