1.Ekelund, U, Brage, S, Froberg, Ket al. (2006) TV viewing and physical activity are independently associated with metabolic risk in children: the European Youth Heart Study. PLoS Med 3, e488.
2.Rey-Lopez, JP, Vicente-Rodriguez, G, Bueno, Get al. (2011) Sedentary behaviors and obesity in children and adolescents. In Epidemiology of Obesity in Children and Adolescents: Prevalence and Etiology, pp. 367–376 [LA Moreno, I Pigeot and W Ahrens, editors]. New York: Springer Science.
3.Marshall, SJ, Gorely, T & Biddle, SJ (2006) A descriptive epidemiology of screen-based media use in youth: a review and critique. J Adolesc 29, 333–349.
4.American Academy of Pediatrics (2001) Children, adolescents, and television. Pediatrics 107, 423–426.
5.Currie, C, Nic Gabhainn, S, Godeau, Eet al. (2008) Inequalities in Young People's Health: Health Behaviour in School-aged Children (HBSC) Study; International Report from the 2005/2006 Survey. Health Policy for Children and Adolescents no. 5. Copenhagen: WHO Regional Office for Europe.
6.Rey-Lopez, JP, Vicente-Rodriguez, G, Ortega, FBet al. (2010) Sedentary patterns and media availability in European adolescents: the HELENA study. Prev Med 51, 50–55.
7.Marshall, SJ, Biddle, SJ, Gorely, Tet al. (2004) Relationships between media use, body fatness and physical activity in children and youth: a meta-analysis. Int J Obes Relat Metab Disord 28, 1238–1246.
8.Hinkley, T, Salmon, J, Okely, ADet al. (2010) Correlates of sedentary behaviours in preschool children: a review. Int J Behav Nutr Phys Act 7, 66.
9.Biddle, SJ, Gorely, T & Marshall, SJ (2009) Is television viewing a suitable marker of sedentary behavior in young people? Ann Behav Med 38, 147–153.
10.Owen, CG, Nightingale, CM, Rudnicka, ARet al. (2012) Travel to school and physical activity levels in 9–10 year-old UK children of different ethnic origin; Child Heart and Health Study in England (CHASE). PLoS One 7, e30932.
11.Burdette, HL, Whitaker, RC & Daniels, SR (2004) Parental report of outdoor playtime as a measure of physical activity in preschool-aged children. Arch Pediatr Adolesc Med 158, 353–357.
12.Chillon, P, Ortega, FB, Ruiz, JRet al. (2011) Active commuting and physical activity in adolescents from Europe: results from the HELENA study. Pediatr Exerc Sci 23, 207–217.
13.Hamilton, MT, Hamilton, DG & Zderic, TW (2007) Role of low energy expenditure and sitting in obesity, metabolic syndrome, type 2 diabetes, and cardiovascular disease. Diabetes 56, 2655–2667.
14.Hancox, RJ & Poulton, R (2006) Watching television is associated with childhood obesity: but is it clinically important? Int J Obes (Lond) 30, 171–175.
15.Hallal, PC, Wells, JC, Reichert, FFet al. (2006) Early determinants of physical activity in adolescence: prospective birth cohort study. BMJ 332, 1002–1007.
16.Jago, R, Wedderkopp, N, Kristensen, PLet al. (2008) Six-year change in youth physical activity and effect on fasting insulin and HOMA-IR. Am J Prev Med 35, 554–560.
17.Ahrens, W, Bammann, K, de Henauw, Set al. (2006) Understanding and preventing childhood obesity and related disorders – IDEFICS: a European multilevel epidemiological approach. Nutr Metab Cardiovasc Dis 16, 302–308.
18.Bammann, K, Peplies, J, Sjöström, Met al. (2006) Assessment of diet, physical activity and biological, social and environmental factors in a multi-centre European project on diet- and lifestyle-related disorders in children (IDEFICS). J Public Health 14, 279–289.
19.Ahrens, W, Bammann, K, Siani, Aet al. (2011) The IDEFICS cohort: design, characteristics and participation in the baseline survey. Int J Obes (Lond) 35, Suppl. 1, S3–S15.
21.Hoyos Cillero, I, Jago, R & Sebire, S (2011) Individual and social predictors of screen-viewing among Spanish school children. Eur J Pediatr 170, 93–102.
22.Gorely, T, Marshall, SJ & Biddle, SJ (2004) Couch kids: correlates of television viewing among youth. Int J Behav Med 11, 152–163.
23.Fernandes, RA, Junior, IF, Cardoso, JRet al. (2008) Association between regular participation in sports and leisure time behaviors in Brazilian adolescents: a cross-sectional study. BMC Public Health 8, 329.
24.Singh, GK, Yu, SM, Siahpush, Met al. (2008) High levels of physical inactivity and sedentary behaviors among US immigrant children and adolescents. Arch Pediatr Adolesc Med 162, 756–763.
25.Fainardi, V, Scarabello, C, Brunella, Iet al. (2009) Sedentary lifestyle in active children admitted to a summer sport school. Acta Biomed 80, 107–116.
26.He, M, Harris, S, Piche, Let al. (2009) Understanding screen-related sedentary behavior and its contributing factors among school-aged children: a social-ecologic exploration. Am J Health Promot 23, 299–308.
27.Hoyos Cillero, I & Jago, R (2010) Systematic review of correlates of screen-viewing among young children. Prev Med 51, 3–10.
28.Burke, V, Beilin, LJ, Durkin, Ket al. (2006) Television, computer use, physical activity, diet and fatness in Australian adolescents. Int J Pediatr Obes 1, 248–255.
29.Taveras, EM, Field, AE, Berkey, CSet al. (2007) Longitudinal relationship between television viewing and leisure-time physical activity during adolescence. Pediatrics 119, e314–e319.
30.Mota, J, Gomes, H, Almeida, Met al. (2007) Active versus passive transportation to school-differences in screen time, socio-economic position and perceived environmental characteristics in adolescent girls. Ann Hum Biol 34, 273–282.
31.Johnston, LD, Delva, J & O'Malley, PM (2007) Sports participation and physical education in American secondary schools: current levels and racial/ethnic and socioeconomic disparities. Am J Prev Med 33, 4 Suppl., S195–S208.
32.Sirard, JR & Pate, RR (2001) Physical activity assessment in children and adolescents. Sports Med 31, 439–454.