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Related Experiment Video

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Substantiating Appropriate Motion Capture Techniques for the Assessment of Nordic Walking Gait and Posture in Older Adults
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Pedometer accuracy in slow walking older adults.

Jessica B Martin1, Katarina M Krč1, Emily A Mitchell1

  • 1Physiotherapist and was a student in the Masters of Physical Therapy program at the University of British Columbia.

International Journal of Therapy and Rehabilitation
|May 6, 2014
PubMed
Summary

Pedometer accuracy significantly decreases at slower walking speeds in older adults. These devices are problematic for monitoring step counts in seniors with slower gaits, requiring further development.

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Area of Science:

  • Gerontology
  • Biomechanical Engineering
  • Wearable Technology

Background:

  • Assessing physical activity in older adults is crucial for health monitoring.
  • Pedometers are commonly used to track daily step counts.
  • Gait speed naturally slows with aging, potentially impacting device accuracy.

Purpose of the Study:

  • To evaluate the accuracy of 5 different pedometer brands during slow overground walking in older adults.
  • To determine the relationship between walking speed (cadence) and pedometer error in this population.

Main Methods:

  • 18 healthy older adults (mean age 63.6 years) participated.
  • Participants walked 80 meters at 3 pre-set cadences (50, 66, 80 steps/min) and self-selected cadence.
  • Accuracy was assessed by comparing pedometer step counts to actual steps across different speeds.

Main Results:

  • Pedometer accuracy decreased substantially at slower walking speeds.
  • Mean percent errors were 56% (50 steps/min), 40% (66 steps/min), 19% (80 steps/min), and 9% (self-selected).
  • Error ranged from 45.3% (Omron HJ105) to 66.9% (Yamax Digiwalker 200).

Conclusions:

  • Current pedometers exhibit high error rates at slower walking speeds common in older adults.
  • Using pedometers to monitor step counts in this demographic is problematic.
  • Development of pedometers with improved accuracy at low gait speeds is needed.