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Physical Activity Measurement in Children Accepting Table Tennis Training
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Pedometry methods for assessing free-living youth.

Catrine Tudor-Locke1, James J McClain, Teresa L Hart

  • 1Catrine Tudor-Locke is with the Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA. Tudor-Locke@pbrc.edu

Research Quarterly for Exercise and Sport
|August 5, 2009
PubMed
Summary

Accurate measurement of youth physical activity requires quality pedometers and appropriate data analysis. Steps per day is the best metric, with reliability varying by day type and duration.

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Area of Science:

  • Physical Activity Measurement
  • Pedometry in Youth Research
  • Adolescent Health Behaviors

Background:

  • Accurate assessment of physical activity is crucial for understanding youth health.
  • Pedometers are widely used but require methodological considerations for reliable data.
  • Previous research highlights variability in measurement approaches and outcomes.

Purpose of the Study:

  • To synthesize key measurement topics for studying youth physical activity using pedometers.
  • To provide methodological recommendations for instrument choice, data collection, and analysis.
  • To guide researchers in optimizing the quality and interpretability of pedometry data in young populations.

Main Methods:

  • Systematic review and integration of measurement topics in youth physical activity research.
  • Evaluation of instrument and metric selection (steps per day, steps per minute).
  • Analysis of reliability (Intraclass Correlation Coefficients) across different day types and durations.

Main Results:

  • Research-quality pedometers are essential; steps per day is the preferred metric.
  • Reliability (ICC) varies, with lower values for weekend and vacation days.
  • No objective evidence of reactivity; data treatment involves handling missing values, outliers, and transformations.

Conclusions:

  • Standardized methodological approaches are needed for robust youth physical activity research.
  • Steps per day offers a reliable metric, but context (day type, duration) matters.
  • Continued research will refine these recommendations for pedometry in young populations.