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Related Experiment Videos

Comparison of activity levels using the Caltrac accelerometer and five questionnaires

D J Miller1, P S Freedson, G M Kline

  • 1Department of Exercise Science, University of Massachusetts at Amherst 01003.

Medicine and Science in Sports and Exercise
|March 1, 1994
PubMed
Summary

The 7-day recall questionnaire accurately measures physical activity in physical therapists, correlating strongly with electronic motion sensors. This makes it a practical tool for large-scale studies.

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Area of Science:

  • Exercise Physiology
  • Occupational Health
  • Biomedical Engineering

Background:

  • Accurate measurement of physical activity is crucial in healthcare professions.
  • Traditional self-report questionnaires have varying levels of validity and reliability.
  • Electronic motion sensors offer objective physical activity data but can be resource-intensive.

Purpose of the Study:

  • To compare the physical activity levels of physical therapists using five distinct activity questionnaires and an electronic motion sensor (Caltrac).
  • To assess the validity of commonly used physical activity questionnaires against objective sensor data.

Main Methods:

  • Thirty-three physical therapists (26 female, 7 male) participated.
  • Participants were monitored for seven consecutive days using an electronic motion sensor (Caltrac).

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  • Caltrac data were compared with five questionnaires: Baecke, Godin and Shephard, Ross and Jackson (NASA), 3-d record, and 7-d recall.

    • Main Results:

    • A significant positive correlation (r = 0.79, P < 0.01) was found between Caltrac and the 7-d recall questionnaire.
    • The Caltrac also showed significant correlation with the Godin questionnaire (r = 0.45, P < 0.01).
    • The 3-d record questionnaire did not significantly correlate with any other measurement methods.

    Conclusions:

    • The 7-d recall questionnaire demonstrates adequate validity for assessing physical activity in physical therapists, comparable to electronic motion sensors.
    • The 7-d recall is a practical, cost-effective, and user-friendly alternative for large population studies compared to electronic monitoring.
    • Further research may explore the utility of other validated questionnaires in specific occupational health contexts.