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Am J Clin Nutr. 2010 Sep;92(3):491-9. doi: 10.3945/ajcn.2010.29404. Epub 2010 Jun 23.

Effect of change in physical activity on body fatness over a 10-y period in the Doetinchem Cohort Study.

Author information

1
National Institute for Public Health and the Environment, Bilthoven, Netherlands. a.m.may@umcutrecht.nl

Abstract

BACKGROUND:

Obesity is related to many adverse health-related outcomes.

OBJECTIVE:

We investigated whether changes in physical activity were related to less gain in either body weight or waist circumference (WC).

DESIGN:

The association between prospectively assessed physical activity and either body weight or WC was examined in 4944 participants of the Doetinchem Study (men and women aged between 26 and 66 y at baseline). Information on physical activity (derived from a validated physical activity index), body weight, and WC, measured according to standardized procedures, was collected at baseline and at the 5- and 10-y follow-ups.

RESULTS:

Random mixed-effects models showed that a single measurement of physical activity was not clearly related to change in body weight and WC over a 5-y period. However, analyses of repeated measures showed that compared with those who maintained their activity level, those who increased their physical activity over a 5-y period had less gain in WC ( minus 0.35 cm; 95% CI: minus 0.65, minus 0.05 cm) and possibly in body weight ( minus 280 g; 95% CI: minus 620, 5 g). Most importantly, these effects were sustained (although not significantly) in the consecutive 5 y for WC ( minus 0.56 cm; 95% CI: minus 108, 0.04 cm) and for body weight ( minus 590 g; 95% CI: minus 1005, minus 130 g), which indicated that physical activity was truly a determinant of body size changes.

CONCLUSIONS:

An increase in physical activity was associated with a statistically significant lower gain in body weight and in WC, which was maintained during the following 5 y. These findings support the need for public health programs that promote physical activity.

PMID:
20573793
DOI:
10.3945/ajcn.2010.29404
[Indexed for MEDLINE]

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