Physical activity and sedentary lifestyle in children as time-limited functions: Usefulness of the principal component analysis method

From: Behavior Research Methods | Date: August 1, 2007| Author: Et al; Ravaux, Pierre; Soubrier, Stephane; Vilhelm, Christian; Guinhouya, Comlavi B | Copyright information

This study was designed to examine the hourly variation in and the interplay between physical activity and sedentary behavior (SB) in order to highlight key time periods for physical activity interventions for children. Data for physical activity and SB obtained with ActiGraph in 56 boys and 47 girls aged from 8 to 11 years. These data were divided into sixty minute-time samples for moderate-to-vigorous physical activity (MVPA) and SB, and analyzed using a principal component analysis (PCA) a...

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