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Expected values for pedometer-determined physical activity in youth.

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

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

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

This review synthesizes pedometry data for youth, revealing boys generally take more daily steps than girls. Activity levels vary by age and time of day, with significant steps occurring during school hours and after school.

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Area of Science:

  • Pedometry and youth physical activity research.
  • Analysis of habitual and context-specific daily step counts in adolescents.

Background:

  • Understanding youth physical activity patterns is crucial for public health.
  • Pedometry provides objective measures of habitual physical activity in children and adolescents.

Purpose of the Study:

  • To synthesize pedometry literature for youth, focusing on expected daily step values.
  • To construct a habitual activity step-curve for youth aged 6-18 years.
  • To analyze step counts across different daily contexts: school day, physical education, recess, lunch, and out-of-school periods.

Main Methods:

  • Systematic review of pedometry studies published since 1999 focusing on youth.
  • Construction of a youth habitual activity step-curve based on synthesized data.

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  • Analysis of step distribution across various daily activities and timeframes (weekdays vs. weekends).

    • Main Results:

    • Boys aged 6-18 typically accumulate more daily steps than girls.
    • Younger age groups tend to have lower daily step counts than slightly older groups.
    • Boys show a greater decline in steps with age compared to girls.
    • Significant portions of daily steps occur during the school day (41-49%) and after school (47-59%).
    • Weekday step counts range from 10,000-16,000, with slightly lower counts on weekends.

    Conclusions:

    • Youth physical activity, measured by steps, exhibits distinct age and sex-related patterns.
    • School environments and after-school activities are major contributors to daily step accumulation in youth.
    • Findings provide normative data for youth physical activity, useful for health promotion and intervention strategies.