Pedometer determined physical activity tracks in African American adults: The Jackson Heart Study

Robert L. Newton, Hongmei H. M, Patricia M. Dubbert, William D. Johnson, DeMarc A. Hickson, Barbara Ainsworth, Teresa Carithers, Herman Taylor, Sharon Wyatt, Catrine Tudor-Locke

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Background: This study investigated the number of pedometer assessment occasions required to establish habitual physical activity in African American adults.Methods: African American adults (mean age 59.9 ± 0.60 years; 59 % female) enrolled in the Diet and Physical Activity Substudy of the Jackson Heart Study wore Yamax pedometers during 3-day monitoring periods, assessed on two to three distinct occasions, each separated by approximately one month. The stability of pedometer measured PA was described as differences in mean steps/day across time, as intraclass correlation coefficients (ICC) by sex, age, and body mass index (BMI) category, and as percent of participants changing steps/day quartiles across time.Results: Valid data were obtained for 270 participants on either two or three different assessment occasions. Mean steps/day were not significantly different across assessment occasions (p values > 0.456). The overall ICCs for steps/day assessed on either two or three occasions were 0.57 and 0.76, respectively. In addition, 85 % (two assessment occasions) and 76 % (three assessment occasions) of all participants remained in the same steps/day quartile or changed one quartile over time.Conclusion: The current study shows that an overall mean steps/day estimate based on a 3-day monitoring period did not differ significantly over 4 - 6 months. The findings were robust to differences in sex, age, and BMI categories. A single 3-day monitoring period is sufficient to capture habitual physical activity in African American adults.

Original languageEnglish (US)
Article number44
JournalInternational Journal of Behavioral Nutrition and Physical Activity
Volume9
DOIs
StatePublished - Apr 18 2012

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African Americans
Exercise
Body Mass Index
Sex Characteristics
Diet

Keywords

  • African Americans
  • Physical activity assessment
  • Sedentary
  • Validity

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Nutrition and Dietetics
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Pedometer determined physical activity tracks in African American adults : The Jackson Heart Study. / Newton, Robert L.; M, Hongmei H.; Dubbert, Patricia M.; Johnson, William D.; Hickson, DeMarc A.; Ainsworth, Barbara; Carithers, Teresa; Taylor, Herman; Wyatt, Sharon; Tudor-Locke, Catrine.

In: International Journal of Behavioral Nutrition and Physical Activity, Vol. 9, 44, 18.04.2012.

Research output: Contribution to journalArticle

Newton, RL, M, HH, Dubbert, PM, Johnson, WD, Hickson, DA, Ainsworth, B, Carithers, T, Taylor, H, Wyatt, S & Tudor-Locke, C 2012, 'Pedometer determined physical activity tracks in African American adults: The Jackson Heart Study', International Journal of Behavioral Nutrition and Physical Activity, vol. 9, 44. https://doi.org/10.1186/1479-5868-9-44
Newton, Robert L. ; M, Hongmei H. ; Dubbert, Patricia M. ; Johnson, William D. ; Hickson, DeMarc A. ; Ainsworth, Barbara ; Carithers, Teresa ; Taylor, Herman ; Wyatt, Sharon ; Tudor-Locke, Catrine. / Pedometer determined physical activity tracks in African American adults : The Jackson Heart Study. In: International Journal of Behavioral Nutrition and Physical Activity. 2012 ; Vol. 9.
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