[1] Chillon P,Ortega FB,Ruiz JR,et al.Bicycling to school is associated with improvements in physical fitness over a 6-year follow-up period in Swedish children[J].Prev Med,2012,55(2):108-112. [2] Prentice-Dunn H,Prentice-Dunn S.Physical activity,sedentary behavior,and childhood obesity:a review of cross-sectional studies[J].Psychol Health Med,2012,17(3):255-273. [3] Zakeri IF,Adolph AL,Puyau MR,et al.Multivariate adaptive regression splines models for the prediction of energy expenditure in children and adolescents[J].J Appl Physiol,2010,108(1):128-136. [4] Alhassan S,Lyden K,Howe C,et al.Accuracy of accelerometer regression models in predicting energy expenditure and METs in children and youth[J].Pediatric Exercise Science,2012,24(4):519-536. [5] Zhuo Q,Sun R,Gou LY,et al.Total energy expenditure of 16 Chinese young men measured by the doubly labeled water method[J].Biomed Environ Sci,2013,26(6):413-420. [6] Brown WH,Pfeiffer KA,McIver KL,et al.Observational system for recording physical activity in children-preschool (OSRAC-P).OSRAC-P Training Manual for Observers[G].Columbia:University of South Carolina,2009. [7] Van Cauwenberghe E,Labarque V,Trost SG,et al.Calibration and comparison of accelerometer cut points in preschool children[J].Int J Pediatr Obes,2011,6(2):e582-e589. [8] Clemes SA,Biddle SJ.The use of pedometers for monitoring physical activity in children and adolescents:measurement considerations[J].J Phys Act Health,2013,10(2):249-262. [9] Trapp GS,Giles-Corti B,Bulsara M,et al.Measurement of children's physical activity using a pedometer with a built-in memory[J].Journal of Science and Medicine in Sport,2013,16(3):222-226. |