Byun W, Barry A, Lee J. Energy expenditure of daily living activities in 3- to 6 year-old children. J Phys Act Health. 2016;13(Suppl 1):S3-6. Doi: org/10.1123/jpah.20150715
Wang, Y, Lobstein, I. Worlwide trends in childhood overweight and obesity. International Journal of Pediatric Obesity. 2006;1:11-25. Doi: 101080/17477160600586747
World Health Organization. Global action plan on physical activity 2018-2030. More active people for a healthier world [internet]. 2018 [accesed 2018 Sep 30]. Available from: http://apps.who.int/iris/bitstream/handle/10665/272722/9789241514187-eng.pdf?ua=1
Organización Mundial de la Salud. Recomendaciones mundiales sobre actividad física para la salud [internet]. 2010 [citado 2018 abr 15]. Disponible en: http://apps.who.int/ iris/bitstream/10665/44441/1/9789243599977_spa.pdf
United States Department of Health and Human Services. Physical activity guidelines for Americans. 2nd ed. [internet]. 2018 [accesed 2018 Nov 23]. Available from: https://health. gov/paguidelines/secondedition/pdf/Physical_Activity_Guidelines_2nd_edition.pdf
Graves L, Stratton G, Ridgers ND, Cable NT. Energy expenditure in adolescents playing new generation computer games. Br J Sports Med. 2008;42:592-4. Doi: 10.1136/ bmj.39415.632951.80
President’s Council on Fitness, Sports and Nutrition. Too much sitting: health risks of sedentary behaviour and opportunities for change. Research Digest Series. 2012;13(3):1-11.
Owen N, Healy GH, Matthews CE, Dunstan DW. Too much sitting: the population health science of sedentary behavior. Exerc Sports Sci Rev. 2010;38(3):105-13. Doi: 10.1097/ JES.0b013e3181e373a2
Katzmarzyk PT, Church TS, Craig CL, Bouchard C. Sitting time and mortality from all causes, cardiovascular disease and cancer. Med Sci Sports Exerc. 2009;41(5):998-1005. Doi: 10.1249/mss.0b013e3181930355
Pate RR, O’Neill JR, Lobello F. The evolving definition of “sedentary”. Exerc Sports Sci Rev. 2008;36(4):173-78. Doi: 10.1097/JES.0b013e3181877d1a
Gao Z, Chen S, Stodden DF. A comparison of children’s physical activity levels in physical education, recess, and exergaming. J Phys Act Health. 2015;12:349-54. Doi: 10.1123/ jpah.2013-0392
Pelaez S, Alexander S, Roberge, JB, Henderson, M, Bigras JL, Barnett TA. Life in the age of screens’: parent perspectives on a 24-h no screen-time challenge. Clin Obes. 2016;6(4):27380. Doi: 10.1111/cob.12150
Laíño F, Tuñón I. Oportunidades para el juego con movimiento. Niños, niñas y adolescentes entre 5 y 17 años en la Argentina urbana. Buenos Aires: Pontificia Universidad Católica Argentina; 2015.
Tuñón I, Laíño F. Insuficiente actividad física en la infancia: niños, niñas y adolescentes entre 5 y 17 años en la Argentina urbana. Buenos Aires: Pontificia Universidad Católica Argentina; 2014.
Tuñón I. Evolución del desarrollo humano y social de la infancia desde un enfoque de derechos: avances y metas pendientes en los primeros cuatro años del Bicentenario 2010-2011-2012-2013. Buenos Aires: Pontificia Universidad Católica Argentina; 2014.
American Academy of Pediatrics, Comitee on Public Education. Children, adolescents and television. Pediatr. 2001;107(2):423-6. Doi: 10.1542/peds.107.2.423
Tremblay MS, LeBlanc AG, Janssen I, Kho ME, Hicks A, Murumets K, et al. Canadian sedentary behaviour guidelines for children and youth. Appl Physiol Nutr Metab. 2011;36(1):59-64. Doi: 10.1139/H11-012
Veitch J, Salmon J, Ball K. Childrens active free play in local neighborhoods: a behavioral mapping study. Health Education Research. 2008;23(5):870-9. Doi: 10.193/her/cymo74
Extremera AB, Montero PJ. El juego motor como actividad física organizada en la enseñanza y recreación. EmásF, Revista Digital de Educación Física. 2016;7(38):73-83.
Monroy Antón A, Sáez Rodríguez G. Teorías sobre el origen del juego [internet]. 2011 [citado 2019 may 24]. Disponible en: https://www.efdeportes.com/efd153/teorias-sobreel-origen-del-juego.htm
Gray P. The decline of play and the rise of psycopathology in children and adolescents. Amer J Play. 2011;3(4):443-63.
Piaget J, Inhelder B. Psicología del niño. Madrid: Morata; 1969.
Hurlock EB. Desarrollo psicológico del niño. México: McGraw-Hill; 1967.
Worobey J, Lelah L, Gaugler R. Environmental barriers to children’s outdoor summer play. J Behav Health. 2013;2(4):362-5. Doi: 10.5455/jbh.20131125111329
Active Healthy Kids Canada. Is active play extinct? Report card on physical activity for children and youth [internet]. 2012 [accesed 2018 Apr 21]. Available from: http://dvqdas9jty7g6.cloudfront.net/reportcards2012/AHKC%202012%20%20Report%20Card%20 Long%20Form%20-%20FINAL.pdf
Hofferth SL. Changes in American children’s time - 1997 to 2003. Electron Int J Time Use Res [internet]. 2009 [accesed 2018 Oct 20]; 6(1):26-47. Available from: http://www. eijtur.org/
Singer DG, Singer JL, D’Agostino H, DeLong R. Children’s pastimes and play in sixteen nations: is free-play declining? Am J Play. 2009;1(3):283-312.
Clements R. An investigation of the status of outdoor play. Contemporary Issues in Early Childhood. 2004;5:68-80. Doi: 10.2304/ciec.2004.5.1.10
O’Brien J, Smith, J. Childhood transformed? Risk perception and the decline of free play. Br J Occup Ther. 2002;65(3):123-8. Doi: 10.1177/030802260206500304
Brockman R, Jago R, Fox KR. The contribution of active play to the physical activity of primary school children. Prev Med. 2010;51:144-7. Doi: 10.1016/j.ypmed.2010.05.012
Incarbone O. Iniciación deportiva y educación física en edad escolar de 6 a 13 años. Buenos Aires: Stadium; 2010.
Stewart A, Marfell-Jones M, De Ridder H. International standards for the anthropometric assessment. Lower Hutt: isak; 2011.
McKenzie TL. System for observing fitness instruction time. Generic description and procedures manual [internet]. 2012 [accesed 2017 Oct 2]. Available from: http://sallis. ucsd.edu/Documents/Measures_documents/SOFIT_protocol.pdf
McKenzie TL. Use of direct observation to assess physical activity. In: Welk GJ, editor. Physical activity assessments for health-related research. Champaign: Human Kinetics; 2002. p. 179-96.
Calahorro Cañada F, Torres-Luque G, López-Fernández I, Santos-Lozano A, Garatachea N, Álvarez Carnero E. Actividad física y acelerometría; orientaciones metodológicas, recomendaciones y patrones. Nutr Hosp. 2015;31(1):115-28. Doi: 10.3305/nh.2015.31.1.7450
Evenson KR, Cattellier D, Gill K, Ondrak K, McMurray RG. Calibration of two objective measures of physical activity for children. J Sports Sci. 2008;26:1557-65. Doi: 10.1080/02640410802334196
Trost SG, Loprinzi PD, Moore R, Pfeiffer, KA. Comparison of accelerometer cut points for predicting activity intensity in youth. Med Sci Sports Exerc. 2011;43(7):1360-8. Doi: 10.1249/MSS.0b013e318206476e
McKenzie TL, Feldman H, Woods SE, Romero KA, Dahlstrom V, Stone EJ, et al. Children’s activity levels and lesson context during third-grade physical education. Res Q Exerc Sport. 1995;66(3):184-93. Doi: 10.1080/02701367.1995.10608832
United States Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion, Division of Adolescent and School Health. Strategies to improve the quality of physical education [internet]. 2010 [accesed 2010 Nov 1º]. Available from: https://www.cdc.gov/ healthyschools/pecat/quality_pe.pdf
Federal, Provincial and Territorial Governments. Increasing physical activity and reducing sedentary living in Canada: let’s get moving [internet]. 2018 [accesed 2019 May 22]. Available from: https://www.canada.ca/en/public-health/services/publications/ healthy-living/lets-get-moving.html
Ministerio de Sanidad y Consumo, Ministerio de Educación y Ciencia. Actividad física y salud en la infancia y la adolescencia. Guía para todas las personas que participan en su educación [internet]. 2006 [citado 2019 may 22]. Disponible en: https://www.mscbs.gob. es/ciudadanos/proteccionSalud/adultos/actiFisica/docs/ActividadFisicaSaludEspanol.pdf
Ministerio de Salud. Manual director de actividad física y salud de la República Argentina [internet]. 2013 [citado 2019 may 22]. Disponible en: http://www.msal.gob.ar/images/ stories/bes/graficos/0000000074cnt-manual-actividad-fisica_2017.pdf
2.º reporte de calificaciones en actividad física en niños y adolescentes. La actividad física, el deporte y el juego. Un camino para la paz en Colombia [internet]. 2016 [citado 2019 may 23]. Disponible en: https://epiandes.uniandes.edu.co/wp-content/uploads/ Report-Card 2016060916.pdf
Ministerio de Salud, Secretaría Nacional del Deporte. ¡A moverse! Guía de actividad física [internet]. 2017 [citado 2019 may 23]. Disponible en: https://www.paho.org/uru/ index.php?option=com_docman&view=downloadslug=guia-de-actividad-fisica-mspcompressed&Itemid=307
Tremblay MS, Carson V, Chaput J-P, Connor Gorber S, Dinh T, Duggan M, et al. Canadian 24-hour movement guidelines for children and youth: an integration of physical activity, sedentary behaviour, and sleep. Appl Physiol Nutr Metab. 2016;41:S311-27. Doi: dx.doi. org/10.1139/apnm-2016-0151
Burdette HL, Whitaker RC. Resurrecting free play in young children. Looking beyond fitness and fatness to attention, affiliation, and affect. Arch Pediatr Adolesc Med. 2005;159(1):46-50. Doi: 10.1001/archpedi.159.1.46
Rideout VJ, Vandewater VJ, Wartella EA. Zero to six: electronic media in the lives of infants, toddlers and preschoolers. Menlo Park: Henry J. Kaiser Family Foundation; 2003.
Ott AE, Pate RR, Trost SG, Ward DS, Saunders, R. The use of uniaxial and triaxial accelerometers to measure children’s “free-play” physical activity. Pediatr Exerc Sci. 2000;12:360-70. Doi: 10.1123/pes.12.4.360
Howe CA, Freedson PS, Feldman HA, Osganian SK. Energy expenditure and enjoyment of common children’s games in a simulated free-play environment. J Pediatr. 2010;157:93642. Doi: 10.1016/j.jpeds.2010.06.041
Pate RR, O’Neill JR, Mitchell J. Measurement of physical activity in preschool children. Med Sci Sports Exerc. 2010;42(3):508-12. Doi: 10.1249/MSS.0b013e3181cea116
