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Related Experiment Video

Updated: Jul 16, 2025

Influence of Step-Width Manipulation on Running Biomechanics
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Published on: February 28, 2025

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Kinematics and mechanical changes with step frequency at different running speeds.

R M Mesquita1, P A Willems1, G Catavitello1

  • 1Laboratory of Biomechanics and Physiology of Locomotion, Institute of NeuroScience, Université Catholique de Louvain, Place P. de Coubertin, 1, 1348, Louvain-la-Neuve, Belgium.

European Journal of Applied Physiology
|September 8, 2023
PubMed
Summary

Runners adjust lower limb stiffness to match step frequency, not speed. Higher step frequencies optimize elastic rebound by increasing stiffness, while lower frequencies reduce it to limit impact forces.

Keywords:
Bouncing mechanismIntersegmental coordinationNeuromechanicsStiffness

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Area of Science:

  • Biomechanics
  • Human Movement Science

Background:

  • Running performance is influenced by step frequency and stride length.
  • Altering step frequency at a constant speed impacts lower limb mechanics differently.

Purpose of the Study:

  • To investigate the relationship between kinematic and kinetic parameters in running.
  • To compare running mechanics and kinematics at various imposed step frequencies (2–3.6 Hz).

Main Methods:

  • Eight male runners performed treadmill running at five speeds and five step frequencies.
  • Recorded lower-limb segment motion and ground reaction forces.
  • Analyzed mechanical powers, gait parameters, and intersegmental coordination.

Main Results:

  • Low step frequencies reduced vertical stiffness, deviating from elastic rebound to limit ground reaction forces.
  • High step frequencies increased stiffness, optimizing elastic rebound for energy absorption and restoration.

Conclusions:

  • Running step frequency, rather than speed, significantly affects lower limb stiffness and intersegmental coordination.
  • Runners adapt lower limb stiffness to suit a specific step frequency for a given speed.