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Related Experiment Videos

Changes in foot and lower limb coupling due to systematic variations in step width.

Michael B Pohl1, Neil Messenger, John G Buckley

  • 1School of Sport and Exercise Sciences, University of Leeds, Leeds LS2 9JT, UK. bmsmbp@leeds.ac.uk

Clinical Biomechanics (Bristol, Avon)
|November 5, 2005
PubMed
Summary

Altering step width during running impacts rearfoot motion, but midfoot joint coupling remains consistent. Forefoot motion significantly influences subtalar joint kinematics, especially in sagittal and transverse planes.

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Area of Science:

  • Biomechanics
  • Human Movement Science
  • Orthopedics

Background:

  • Midfoot joint motion is crucial for overall foot movement during gait.
  • Kinematic coupling at the midfoot remains under-investigated.
  • Understanding these relationships is key to analyzing foot function during locomotion.

Purpose of the Study:

  • To investigate the effect of manipulated step width on midfoot and subtalar joint kinematic coupling during running.
  • To determine if altered step width changes the relationship between different foot segments.

Main Methods:

  • Twelve subjects ran at self-selected speeds with normal, wide, and cross-over step widths.
  • Kinematic coupling at the midfoot (forefoot vs. rearfoot) and subtalar (rearfoot vs. shank) joints was analyzed.

Related Experiment Videos

  • Cross-correlation techniques were employed to quantify coupling strength.

    • Main Results:

    • Rearfoot kinematics differed significantly in cross-over running compared to normal.
    • Consistent, high coupling was observed between rearfoot inversion/eversion and shank rotation.
    • Strong coupling existed between rearfoot frontal plane motion and forefoot sagittal/transverse plane motions.
    • Little coupling was found between rearfoot and forefoot frontal plane motions.

    Conclusions:

    • Forefoot frontal plane motion minimally impacts rearfoot frontal plane motion and subtalar joint kinematics.
    • Strong coupling between forefoot sagittal/transverse plane motions and rearfoot frontal motion highlights forefoot's significant influence on subtalar joint function.