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Pedometer steps/min in physical education: does the pedometer matter?

Philip W Scruggs1

  • 1Department of Movement Sciences, University of Idaho, USA. pwscruggs@uidaho.edu

Journal of Science and Medicine in Sport
|July 4, 2012
PubMed
Summary

The Walk4Life (W4L) pedometer accurately measures physical activity in physical education, but step count guidelines differ by device. Ensure pedometer brand is considered for accurate physical activity surveillance.

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Area of Science:

  • Kinesiology
  • Physical Education
  • Biomedical Engineering

Background:

  • Physical activity guidelines in physical education are crucial for student health.
  • Pedometers are commonly used to quantify physical activity, but accuracy varies by device.
  • Previous research established step/min cut-points using Yamax pedometers.

Purpose of the Study:

  • To replicate previous Yamax pedometer findings using the Walk4Life (W4L) pedometer.
  • To determine W4L pedometer steps/min cut-point intervals for 33% and 50% physical activity (%PA) guidelines in physical education.
  • To validate W4L pedometer accuracy in discriminating between physical activity guideline achievement levels.

Main Methods:

  • Field-based criterion-referenced validation.

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  • Collected concurrent pedometer (W4L and Yamax) and behavioral observation (%PA) data from 411 students (grades 5-12) across 75 physical education lessons.
  • Analyzed data using Pearson r correlation and receiver-operating characteristic (ROC) curve analysis.

    • Main Results:

    • Strong correlation (r=0.96) between steps/min and %PA for both W4L and Yamax pedometers.
    • W4L pedometer demonstrated high accuracy (ROC AUC ≥ 98%) in discriminating %PA guideline achievement.
    • W4L steps/min cut-points for the 33%PA guideline were significantly lower than Yamax, with borderline overlap for the 50%PA guideline.

    Conclusions:

    • W4L pedometer steps/min strongly correlates with %PA and accurately discriminates physical education activity guidelines.
    • Steps/min values for achieving physical education guidelines are dependent on the pedometer brand.
    • Consider pedometer brand for accurate implementation and surveillance of physical activity in educational settings.