[1. Alves, J., Montenegro F, Oliveira F. & Alves R. (2005]. Sports during adolescence and physical activity in the leisure time in adulthood. Revista Brasileira de Medicina do Esporte 11(5), 291-294. [in Portuguese]10.1590/S1517-86922005000500009]Search in Google Scholar
[2. Matias, T., Rolim M., Kretzer F., Schmoelz C., Andrade A. (2010). Adolescents well-being and physical activity. Motriz. Journal of Physical Education. IJNESP 16(2), 370-378. [in Por- tuguese]]Search in Google Scholar
[3. World Health Statistics. (2006, ]uly). Public Health Mapping and GIS, Communicable Diseases, World Health Organization. Retrieved July 5, 2010, from the World Wide Web: http://books.google.com/books?id=C8rkX-p52UcC&printscc=fronlcover&dq=world+Heallh+Organization++2006&hl=lv&ei=mnBwTv69l4X2sgbGkPXlBg&sa=X&oi=book_resull&ct=result&resnum=2]Search in Google Scholar
[4. Tassitano, R., Bezerra J., Tenorio M., Colares V., Barros M. & Hallal P (2007). Physical activity of Brazilian adolescents: a systematic review. Rev Bras Cineantrop Desempenho Hum 9(1), 55-60. [in Portuguese]]Search in Google Scholar
[5. Hallal, P., Bertoldi A., Goncalves H. & Victora C. (2006). Prevalence of sedentary life style and it's factors for 10-12 years old adolescents. Caderno Saúde Pública 22(6), 1277-1287. [in Portuguese]10.1590/S0102-311X2006000600017]Search in Google Scholar
[6. World Health Organization WHO. (2003, December). Global Strategy on diet, Physical activity and Health Physical activity. Re-trieved December 14, 2009, from WHO database on the World Wide Web: http://www.who.int/dietphysical-activity/media/en/gsfs_pa.pdf.]Search in Google Scholar
[7. Paluska, S.A. & Schwenk T.L. (2000). Physical Activity and Menial Health: Current Concepts. Sports Medicine 29(3), 167-180.10.2165/00007256-200029030-0000310739267]Search in Google Scholar
[8. Harris, K., Kuramoto L., Schulzer M. & Retallack J. (2009). Effect of school-based physical activity interventions on body mass index in children: a meta-analysis. CMAJ 180(7), 719-726.10.1503/cmaj.080966265983619332753]Search in Google Scholar
[9. Van den Bulk, J. & Hofman A. (2009). The television-to- exercise ratio is a predictor of overweight in adolescents: Results from a prospective cohort study with a two year fol- low up. Preventive Medicino 48(4), 368-371.10.1016/j.ypmed.2009.02.00619463482]Search in Google Scholar
[10. Batalha, S., Sousa M., Silveira V., Brandt R. & Andrade A. (2011, August). Physical activity as a promotion of physical and mental health of adolescents. Retrieved August 5, 2011, from EFDeportes.com on the World Wide Web: http://www.efdeportes.com. [in Portuguese]]Search in Google Scholar
[11. European Commission. (2010, January). Special Euro- barometer Sport and Physical Activity. Retrieved January 27,2011, from European Commission database on the World Wide Web: http://ec.europa.eu/public_opinion/archives/ebs/ebs_334_en.pdf]Search in Google Scholar
[12. Loucaides.C.A., Jago R. & Charalambous I. (2009, February). Promoting physical activity during school break times: Pi- loting a simple, low cost intervention. Retrieved February 17, 2011, from Preventive Medicine database on the World Wide Web: http://www.sciencedirect.com/science/article/pii/S0091743509000711]Search in Google Scholar
[13. Racette, S B, Cade W.T. & Becman L.R. (2010). School-Based Physical Activity and Fitness Promotion. Physical Therapy 90 (9).10.2522/ptj.20100039336716020810388]Search in Google Scholar
[14. Spona, A. (2006). Educational process in theory and prac- tice. Riga: RaKa. [in Latvian]]Search in Google Scholar
[15. Liegeniece, D. (1999). Holistic approach of education. Riga: RaKa. [in Latvian]]Search in Google Scholar
[16. Liegeniece, D. (1998). Interaction. Let's learn by cooperating. Riga: „Mäcíbu grämata”, SIA. [in Latvian]]Search in Google Scholar
[17. Piažé, Ž. (2002). Intellectual development of child. Riga: Petergailis. [in Latvian]]Search in Google Scholar
[18. Maslow, A. (1970). Motivation and personality (2nd edition). New York: Harper &Row.]Search in Google Scholar
[19. Vygotsky, L. (1991). Educational psychology. Moscow: Peda- gogika. [in Russian]]Search in Google Scholar
[20. Kolb, D. (1984). Experiential learning: experience as the source of learning and development. New Jersey: Englewood Cliffs.]Search in Google Scholar
[21. Andreeva, G. (1980). Social psychology. Moscow: Peda- gogika. [in Russian]]Search in Google Scholar
[22. Mosston, M. & Ashworth S. (2002). Teaching physical educa- tion (5n edition.). San Francisco: Benjamin Cummings.]Search in Google Scholar
[23. Chatoupis, C. (2000).The effects of two teaching styles on physical fitness and perceived athletic competence of fifth grade students. European Journal of Sport Science 3(1). ]Search in Google Scholar