1. Physical activity and sedentary lifestyle in children as time-limited functions: Usefulness of the principal component analysis method
- Author
-
Mohamed Lemdani, Alain Durocher, Christian Vilhelm, Stéphane Soubrier, Hervé Hubert, P Ravaux, and Comlavi B. Guinhouya
- Subjects
Male ,Physical activity interventions ,Psychological intervention ,Physical activity ,Experimental and Cognitive Psychology ,Sedentary behavior ,Motor Activity ,Correlation ,Arts and Humanities (miscellaneous) ,Principal component analysis ,Developmental and Educational Psychology ,Humans ,Female ,Psychology (miscellaneous) ,Child ,Psychology ,Life Style ,General Psychology ,Simulation ,Demography ,Sedentary lifestyle ,Morning - Abstract
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) and correlation statistics. The PCA provides 10 factors which account for 80.4% of the inertia. Only two of these factors did not display competition between MVPA and SB. Contrary to some reports, a coefficient of correlation of —.68 (p
- Published
- 2007
- Full Text
- View/download PDF