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Related Experiment Video

Updated: May 3, 2026

Substantiating Appropriate Motion Capture Techniques for the Assessment of Nordic Walking Gait and Posture in Older Adults
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Monitoring Age-Related Changes in Gait Complexity in the Wild with a Smartphone Accelerometer System.

Vincenzo E Di Bacco1, William H Gage1

  • 1School of Kinesiology and Health Science, York University, Toronto, ON M3J 1P3, Canada.

Sensors (Basel, Switzerland)
|November 27, 2024
PubMed
Summary

Smartphone accelerometers can track gait changes in older adults during daily life. This study found significant differences in gait adaptability between young and older adults using this technology for remote fall-risk assessment.

Keywords:
adaptabilityentropyfree-living walkingnonlinear dynamicsstatistical persistencevariabilitywearables

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Area of Science:

  • Biomechanics
  • Gerontology
  • Wearable Technology

Background:

  • Gait adaptability changes with age and is typically measured in controlled lab settings.
  • Smartphones offer a potential tool for accessible, everyday gait analysis.

Purpose of the Study:

  • To investigate age-related differences in linear and nonlinear gait measures using smartphone accelerometers in a free-living environment.
  • To assess the viability of smartphone accelerometers for remote gait monitoring and fall-risk assessment.

Main Methods:

  • Thirteen young adults (YA) and 11 older adults (OA) walked in a shopping mall with a smartphone accelerometer (SPAcc) in their pocket.
  • Inter-stride interval data was collected and analyzed for linear and nonlinear gait measures.

Main Results:

  • Significant age-related differences were found in stride-time variability, sample entropy (SaEn), and statistical persistence decay.
  • The fractal scaling index was similar between groups but higher than in controlled settings, suggesting increased adaptive behavior.

Conclusions:

  • SPAcc is a viable tool for remote monitoring of gait dynamics in free-living conditions.
  • This technology has implications for unsupervised fall-risk assessment in older adults.