Dr. Jean-Philippe Chaput is co-author on a paper, “Combined physical activity/sedentary behaviour associations with indices of adiposity in 8- to 10-year-old children,” that was recently published in the Journal of Physical Activity & Health. Citation details and a summary of the paper are below.

Herman KM1, Chaput JP, Sabiston CM, Mathieu ME, Tremblay A, Paradis G. Combined physical activity/sedentary behaviour associations with indices of adiposity in 8- to 10-year-old children. J Phys Act Health. 2015 Jan;12(1):20-9.

ABSTRACT: Objective. Individuals may achieve high physical activity (PA) yet also be highly sedentary (SED). This study assessed adiposity in childrenclassified by PA/SED groups. Methods. Participants were 520 8– to 10-year-old children with ≥ 1 obese parent. Moderate-to-vigorous PA (MVPA) and SED were measured by accelerometer, and screen-time was measured by self-report. Height, weight, waist circumference (WC), body fat percentage (BF%), and VO2peak were objectively measured; energy intake was measured by dietary recall. Elevated adiposity was defined as BMI ≥ 85th percentile, WC ≥ 90th percentile, BF% ≥ 85th percentile, or waist-to-height ratio (WHR) ≥ 0.5. Results. Up to 27% of boys and 15% of girls were active/SED. Adiposity was lowest for active/non-SED, highest for inactive/SED, and intermediate and similar for active/SED and inactive/non-SED. Using 60 min/d MVPA and 2 h/d screen-time cut-offs, prevalence ranges for elevatedadiposity in the active/non-SED, active/SED, inactive/non-SED, and inactive/SED groups were 0% to 14%, 15% to 44%, 16% to 40%, and 32% to 51%, respectively. Corresponding odds and 95% confidence intervals of being overweight/obese for the latter groups were 3.8 (95% CI, 1.7-8.4), 3.8(1.88.2), and 4.9 (2.3-10.3) versus active/non-SED. PA/SED-adiposity associations were mediated by fitness but not energy intake. Conclusions. Combined PA/SED levels are strongly associated with adiposity in children, but associations are mediated by fitness. Activechildren who accumulate >2 h/d of screen time and inactive children are equally likely to be overweight/obese.