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Foot contact identification using a single triaxial accelerometer during running.

Kevin G Aubol1, Clare E Milner1

  • 1Department of Physical Therapy & Rehabilitation Sciences, Drexel University, USA.

Journal of Biomechanics
|April 18, 2020
PubMed
Summary
This summary is machine-generated.

A new method using tibial acceleration accurately identifies foot contact in runners. This technique is effective even with low impact peaks, offering a simpler alternative for biomechanics analysis.

Keywords:
Impact shockMobile monitoringResultant accelerationWearable

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Area of Science:

  • Biomechanics
  • Sports Science
  • Wearable Technology

Background:

  • Accurate foot contact identification is crucial for in-field biomechanics analysis.
  • Current accelerometer-based methods often require multiple sensors or struggle with low impact peaks.
  • Resultant tibial acceleration presents a potential solution to these limitations.

Purpose of the Study:

  • To develop a novel technique for identifying foot contact time during running using a single accelerometer.
  • To establish the concurrent validity of this new method against established biomechanical measures.
  • To assess the technique's efficacy in rearfoot strike running.

Main Methods:

  • A single triaxial accelerometer was placed on the distal tibia of 19 rearfoot strike runners.
  • An algorithm was developed to detect foot contact from a local minimum in the resultant tibial acceleration waveform.
  • The new method's results were compared against vertical ground reaction force measurements.

Main Results:

  • The tibial acceleration method identified foot contact 2.3 ± 4.7 ms earlier than the ground reaction force.
  • 95% limits of agreement were -6.8 to 11.5 ms, with 95% of contacts differing by less than 10 ms.
  • The technique demonstrated favorable comparison to existing accelerometer methods and performed well with low peak accelerations.

Conclusions:

  • The developed technique reliably identifies foot contact time during running using a single tibial accelerometer.
  • This method overcomes limitations of previous techniques, particularly when impact peaks are low.
  • The technique is recommended for field-based biomechanics analysis, especially in scenarios with variable impact magnitudes.