Are current body mass index referenced pedometer step-count recommendations applicable to US youth?

Michael W. Beets, Guy C. Le Masurler, Aaron Beighle, David A. Rowe, Charles F. Morgan, Jack Rutherford, Michael Wright, Paul Darst, Robert Pangrazl

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Background: The purpose of this study was to cross-validate international BMI-referenced steps/d cut points for US girls (12,000 steps/d) and boys (15,000 steps/d) 6 to 12 years of age. Methods: Secondary pedometer-determined physical activity data from US children (N = 1067; 633 girls and 434 boys, 6 to 12 years) were analyzed. Using international BMI classifications, cross-validation of the 12,000 and 1.5,000 steps/d cut points was examined by the classification precision, sensitivity, and specificity for each age-sex stratum. Results: For girls (boys) 6 to 12 years, the 12,000 (15,000) steps/d cut points correctly classified 42% to 60% (38% to 67%) as meeting (achieved steps/d cut point and healthy weight) and failing (did not achieve steps/d cut point and overweight). Sensitivity ranged from. 55% to 85% (64% to 100%); specificity ranged from 23% to 62% (19% to 50%). Conclusion: The utility of pedometer steps/d cut points was minimal in this sample given their inability to differentiate among children who failed to achieve the recommended steps/d and exhibited an unhealthy weight. Caution, therefore, should be used in applying previous steps/d cut points to US children.

Original languageEnglish
Pages (from-to)665-674
Number of pages10
JournalJournal of Physical Activity and Health
Volume5
Issue number5
DOIs
StatePublished - Sep 2008

Keywords

  • Children
  • Obesity
  • Physical activity

ASJC Scopus subject areas

  • General Medicine

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