Tracking of Pedometer-Determined Physical Activity: A 10-Year Follow-Up Study From Adolescence to Adulthood in Sweden

in Journal of Physical Activity and Health
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Background:

Tracking refers to the tendency for an individual to maintain their rank within a group over time.

Purpose:

To identify levels of pedometer determined physical activity and explore tracking over 10-year follow up period.

Methods:

In October of 2000, 2003, 2005, and 2010, data of physical activity as steps/day was measured with Yamax SW-200 Tokyo, Japan for 4 consecutive schooldays in 40 (19 females) Swedish individuals (mean age 12.7 in 2000).

Results:

In boys a decrease of mean step/day occurred between baseline and the 3-year (P < .001), the 5-year (P < .001) and the 10-year follow-up (P < .014). A significant moderate tracking occurred in those at baseline classified insufficient active, both over the 3- to 5-year span (rs = 0.56, P = .005) and the 0- to 10-year span (rs = 0.47, P = .05).

Conclusion:

The significant decrease of physical activity, as steps/day, in males at early adolescent seems to level out during late adolescence and early adulthood. Further, youth classified insufficient active according to published BMI reference standards at the baseline measures showed a significant moderate tracking over the 10-year follow-up period.

Raustorp is with the School of Sport Sciences, Linnaeus University, Kalmar, Sweden and with the Dept of Nutrition and Sport Sciences, University of Gothenburg, Sweden. Ekroth is with Oskarshamns Community, Oscars Gymnasium, Oskarshamn, Sweden.

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