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A treadmill-mounted force platform.

R Kram1, A J Powell

  • 1Museum of Comparative Zoology, Harvard University, Bedford, Massachusetts 01730.

Journal of Applied Physiology (Bethesda, Md. : 1985)
|October 1, 1989
PubMed
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This study introduces a treadmill-mounted force platform for efficient measurement of locomotion forces. This innovation significantly reduces data collection time for muscle, bone, and tendon forces during gait analysis.

Area of Science:

  • Biomechanics
  • Locomotion analysis
  • Musculoskeletal research

Background:

  • Ground-mounted force platforms traditionally measure locomotion forces but are time-consuming.
  • Obtaining repeatable constant speed trials, especially with animals, presents significant challenges.
  • Accurate force measurements are crucial for understanding musculoskeletal loading during movement.

Purpose of the Study:

  • To develop a more efficient method for measuring forces during terrestrial locomotion.
  • To overcome the time constraints associated with traditional force platform measurements.
  • To enable accurate data collection over a wide range of speeds and gait perturbations.

Main Methods:

  • A force platform was mounted directly beneath the belt of a motorized treadmill.

Related Experiment Videos

  • This setup allows for continuous recording of ground reaction forces during successive limb contacts.
  • The system was evaluated for cross-talk, natural frequency, nonlinearity, and position independence.

    • Main Results:

    • The treadmill-mounted force platform significantly reduces data collection time.
    • Accurate measurements of vertical ground reaction force, peak musculoskeletal forces, center of mass displacement, and limb contact time are achievable.
    • The system demonstrates acceptable technical specifications, with minimal cross-talk and vibrations easily filtered.

    Conclusions:

    • Treadmill-mounted force platforms offer a highly efficient and accurate method for studying locomotion biomechanics.
    • This method facilitates extensive data acquisition for musculoskeletal force analysis in various conditions.
    • The technology is suitable for both steady-state locomotion and perturbed gaits, advancing research in animal and human movement.