3[5]Femando SD, Paranavitane SR, Rajakaruna J, et al., The health and nutritional status of school children in two rural communities in Sri Lanka. Trop Med Int Health, 2000
4[6]Keller W, Filmore CM, Prevalence of protein-energy malnutrition.World Health Statistics. Quarterly, 1983
5[7]Brancati FL, Wang NY, Mead LA, Liang KY, Klag MJ Body weight patters from 20 to 49 years of age and subsequent risk for diabetes mellitus: the Johns Hopkins Precursors Study. Arch Intern Med, 1999
6[8]McMurray RG, Harrell JS, Bangdiwala SI, Deng S. Cardiovascular disease risk factors and obesity of rural and urban elementary school children. J Rural Health, 1999
7[9]Ji CY, Ohsawa S, and Kasai N, Secular changes in the stature, weight, and age at maximum growth increments of urban Chinese girls from the 1950sto 1985. Am. J. Hum. Biol,1995
4USDHHS. Physical Activity and Health : A report of the Sur-geon General [ R ]. Atlanta, GA: Centers for Disease Controland Prevention, 1996, 3 -8.
5Boreham C,Riddoch C. The physical activity,fitness andhealth of children[ J] - J Sports Sci. 2001,19 ( 12) : 915 —929.
6Twisk J W,Kemper H C,van Mechelen W. Prediction of car-diovascular disease risk factors later in life by physical activityand physical fitness in youth : general comments and conclu-sions [J ]. Int J Sports Med. 2002, 23 Suppl 1 : S44 — S49.
7Rowlands A V. Accelerometer assessment of physical activityin children; an update[ J]. Pediatr Exerc Sci. 2007 , 19(3 );252 -266.
8Hootman J M. 2008 Physical Activity Guidelines for Ameri-cans :an opportunity for athletic trainers [ J]. J Athl Train.2009’ 44(1) : 5 -6.
9U. S. Department of Health and Human Service. Physical Activity and Health:a Report of the Sur- geon General [ M ]. Atlanta, GA : U. S. Department of Health and Human Service, Center for Disease Control and Prevention, and National Center for Chronic Disease Prevention and Health Promotion, 1996:20 - 144.
10Ward D S, Evenson K R, Vaughn A, et al. Acceler- ometer use in physical activity:best practices and research recommendations [ J ]. Med Sci Sport Exe,2005,37 ( 11 ) : S582 - S588.
