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Related Experiment Video

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Accelerometry-Based Step Count Validation for Horse Movement Analysis During Stall Confinement.

Samantha L Steinke1,2, Julia B Montgomery1,2, John M Barden3

  • 1Biomedical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, SK, Canada.

Frontiers in Veterinary Science
|July 9, 2021
PubMed
Summary
This summary is machine-generated.

Inertial measurement units (IMUs) accurately track equine steps during stall confinement. The best sensor placement for monitoring horse mobility and detecting subtle injury changes is on the right forelimb.

Keywords:
accelerometerapple watchbiomechanicsequineinertial measurement unitmotion trackingrehabilitation

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Area of Science:

  • Equine science
  • Biomechanics
  • Veterinary technology

Background:

  • Quantitative tracking of equine movement during stall confinement can detect subtle mobility changes indicative of injury.
  • Early detection of mobility changes is vital for directing rehabilitation protocols in horses.
  • Inertial measurement units (IMUs) offer a readily available, objective method for recording equine step counts.

Purpose of the Study:

  • To compare IMU-based step counts with video analysis for three distinct equine movements in a stall.
  • To evaluate three different sensor positions for IMUs to identify the optimal location for assessing horse movement.
  • To determine the ideal sensor placement for accurate step counting during stall confinement.

Main Methods:

  • An IMU was attached to six horses at the withers, right forelimb, and hindlimb.
  • Data were collected during free movement, circles, and figure-eights in 5-minute intervals.
  • Accuracy was assessed by comparing IMU step counts to a video-based criterion measure using mean difference, absolute error, and intraclass correlation coefficients (ICCs).

Main Results:

  • The right-forelimb vertical-axis IMU position yielded the best results (ICC = 1.0, % error = 6.8, mean difference = 1.3).
  • The right-hindlimb position also showed high accuracy (ICC = 0.999, % error = 15.2, mean difference = 1.8).
  • Excellent agreement was observed between IMU vertical axis data and video analysis at both forelimb and hindlimb locations across all movement types.

Conclusions:

  • IMUs demonstrate high accuracy in quantifying equine steps during stall confinement when placed on the limbs.
  • The forelimb and hindlimb sensor positions are suitable for monitoring horse mobility and detecting subtle changes.
  • This technology has potential for early detection of complications and guiding rehabilitation strategies in horses.