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Related Experiment Videos

Utility of pedometers for assessing physical activity: construct validity.

Catrine Tudor-Locke1, Joel E Williams, Jared P Reis

  • 1Department of Exercise and Wellness, Arizona State University East, Mesa, Arizona 85212, USA.

Sports Medicine (Auckland, N.Z.)
|April 27, 2004
PubMed
Summary

Pedometer-assessed physical activity shows weak inverse relationships with age and body weight, but moderate positive relationships with fitness indicators. This supports pedometers for research and practice.

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Area of Science:

  • Exercise Physiology
  • Biomedical Measurement
  • Public Health Surveillance

Background:

  • Accurate physical activity assessment is crucial for health research and interventions.
  • Pedometer validity is explored in two companion articles, focusing on convergent and construct validity.
  • Construct validity examines how pedometer measurements correlate with theoretically related parameters.

Purpose of the Study:

  • To evaluate the construct validity of pedometer-assessed physical activity.
  • To synthesize evidence on pedometer correlations with age, anthropometric measures, and fitness.
  • To inform the use of pedometers in research and practical applications.

Main Methods:

  • Systematic literature review of 29 articles published since 1980.

Related Experiment Videos

  • Analysis of correlations between pedometer-determined steps/day and related parameters.
  • Calculation of median correlation coefficients (r-values) for synthesized data.

    • Main Results:

    • Weak inverse relationship between age and pedometer activity (median r = -0.21).
    • Weak inverse relationships with body mass index and percentage overweight (median r = -0.27 and -0.22).
    • Moderate positive relationships with fitness measures: 6-minute walk test (median r = 0.69), timed treadmill test (median r = 0.41), and estimated maximum oxygen uptake (median r = 0.22).

    Conclusions:

    • Pedometer construct validity is supported by correlations with age, anthropometry, and fitness.
    • Further research is needed on pedometer relationships with blood pressure, glucose, and lipid profiles.
    • Pedometers are suitable for research and practice, supported by convergent and construct validity evidence.