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Related Experiment Videos

Visual guidance to force plates does not influence ground reaction force variability

M D Grabiner1, J W Feuerbach, T M Lundin

  • 1Department of Biomedical Engineering, Cleveland Clinic Foundation, OH 44106, USA.

Journal of Biomechanics
|September 1, 1995
PubMed
Summary
This summary is machine-generated.

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This study found that targeting a force plate during gait analysis does not significantly alter ground reaction force variability. Therefore, targeting is unlikely to impact kinetic variable calculations in gait research.

Area of Science:

  • Biomechanics
  • Human Movement Analysis
  • Gait Dynamics

Background:

  • Gait analysis often prohibits visual targeting of force plates, assuming it alters natural gait.
  • The impact of targeting on ground reaction force (GRF) variability remains insufficiently studied.

Purpose of the Study:

  • To investigate the effect of force plate targeting on GRF variability during gait.
  • To examine secondary factors: single vs. multiple steps and subject awareness of study purpose.

Main Methods:

  • Analysis of variance (ANOVA) was used to assess GRF variability in 15 healthy subjects.
  • Subjects performed gait tasks with and without visual targeting of the force plate.
  • Data collected included ground reaction forces (GRF) and kinematic variables.

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Main Results:

  • Force plate targeting did not significantly influence overall GRF variability (p > 0.05).
  • A significant effect was observed for the number of steps to the force plate on anterior-posterior (AP) force variability (p = 0.002).
  • Subject awareness of the study's purpose did not significantly impact GRF variability (p > 0.05).

Conclusions:

  • Force plate targeting does not significantly alter GRF variability in normal gait.
  • Targeting is unlikely to introduce confounding variability into kinetic calculations derived from GRF.
  • The number of steps to the force plate can influence gait dynamics, warranting consideration in analysis.