TY - JOUR AU - Biddle, S. J. AU - Gorely, T. AU - Stensel, D. J. PY - 2004 DA - 2004// TI - Health-enhancing physical activity and sedentary behaviour in children and adolescents JO - J Sports Sci VL - 22 UR - https://doi.org/10.1080/02640410410001712412 DO - 10.1080/02640410410001712412 ID - Biddle2004 ER - TY - JOUR AU - Biro, F. AU - Wien, M. PY - 2010 DA - 2010// TI - Childhood obesity and adult morbidities JO - Am J Clin Nutr VL - 91 UR - https://doi.org/10.3945/ajcn.2010.28701B DO - 10.3945/ajcn.2010.28701B ID - Biro2010 ER - TY - STD TI - Corder K, van Sluijs EM, Ekelund U, Jones AP, Griffin SJ. Changes in children's physical activity over 12 months: longitudinal results from the SPEEDY study. Pediatrics. 2010;126(4):e926–35. ID - ref3 ER - TY - STD TI - .Currie C, Zanotti C, Morgan A, Currie D, de Looze M, Roberts Ch, et al. eds. Social determinants of health and well-being among young people. Health Behaviour in School-aged Children (HBSC) study: international report from the 2009/2010 survey. Copenhagen: WHO Regional Office for Europe; 2012. ID - ref4 ER - TY - STD TI - .Perusopetusasetus. (The Finnish Act of Basic Education). 1998/852. http://www.finlex.fi/fi/laki/alkup/1998/19980852. Accessed 4 Jan 2016. UR - http://www.finlex.fi/fi/laki/alkup/1998/19980852 ID - ref5 ER - TY - STD TI - .Opetushallitus, Board of Education, Koulun kerhotoiminnan esite (The Brochure of activity in the Finnish School Clubs).2014. www.edu.fi/perusopetus/kerhotoiminta. Accessed 4 Jan 2016.  UR - http://www.edu.fi/perusopetus/kerhotoiminta ID - ref6 ER - TY - JOUR AU - Helmerhorst, H. J. AU - Brage, S. AU - Warren, J. AU - Besson, H. AU - Ekelund, U. PY - 2012 DA - 2012// TI - A systematic review of reliability and objective criterion-related validity of physical activity questionnaires JO - Int J Behav Nutr Phys Act VL - 9 UR - https://doi.org/10.1186/1479-5868-9-103 DO - 10.1186/1479-5868-9-103 ID - Helmerhorst2012 ER - TY - STD TI - Lubans DR, Hesketh K, Cliff DP, Barnett LM, Salmon J, Dollman J, et al. A systematic review of the validity and reliability of sedentary behaviour measures used with children and adolescents. Obes Rev. 2011;12(10):781–99. ID - ref8 ER - TY - JOUR AU - Sallis, J. F. PY - 1991 DA - 1991// TI - Self-report measures of children's physical activity JO - J Sch Health VL - 61 UR - https://doi.org/10.1111/j.1746-1561.1991.tb06017.x DO - 10.1111/j.1746-1561.1991.tb06017.x ID - Sallis1991 ER - TY - JOUR AU - Sirard, J. R. AU - Pate, R. R. PY - 2001 DA - 2001// TI - Physical activity assessment in children and adolescents JO - Sports Med VL - 31 UR - https://doi.org/10.2165/00007256-200131060-00004 DO - 10.2165/00007256-200131060-00004 ID - Sirard2001 ER - TY - JOUR AU - Kohl, H. W. AU - Fulton, J. E. AU - Caspersen, C. J. PY - 2000 DA - 2000// TI - Assessment of Physical Activity among Children and Adolescents: A Review and Synthesis JO - Prev Med VL - 31 UR - https://doi.org/10.1006/pmed.1999.0542 DO - 10.1006/pmed.1999.0542 ID - Kohl2000 ER - TY - JOUR AU - Sallis, J. F. AU - Saelens, B. E. PY - 2000 DA - 2000// TI - Assessment of physical activity by self-report: status, limitations, and future directions JO - Res Q Exerc Sport VL - 71 UR - https://doi.org/10.1080/02701367.2000.11082780 DO - 10.1080/02701367.2000.11082780 ID - Sallis2000 ER - TY - JOUR AU - Jago, R. AU - Baranowski, T. AU - Baranowski, J. C. AU - Cullen, K. W. AU - Thompson, D. I. PY - 2007 DA - 2007// TI - Social desirability is associated with some physical activity, psychosocial variables and sedentary behavior but not self-reported physical activity among adolescent males JO - Health Educ Res VL - 22 UR - https://doi.org/10.1093/her/cyl107 DO - 10.1093/her/cyl107 ID - Jago2007 ER - TY - STD TI - Klesges LM, Baranowski T, Beech B, Cullen K, Murray DM, Rochon J, et al. Social desirability bias in self-reported dietary, physical activity and weight concerns measures in 8- to 10-year-old African-American girls: results from the Girls Health Enrichment Multisite Studies (GEMS). Prev Med. 2004;38(Suppl):S78–87. ID - ref14 ER - TY - JOUR AU - Trost, S. G. PY - 2007 DA - 2007// TI - State of the Art Reviews: Measurement of Physical Activity in Children and Adolescents JO - Am J Lifestyle Med VL - 1 UR - https://doi.org/10.1177/1559827607301686 DO - 10.1177/1559827607301686 ID - Trost2007 ER - TY - JOUR AU - Hanggi, J. M. AU - Phillips, L. R. AU - Rowlands, A. V. PY - 2013 DA - 2013// TI - Validation of the GT3X ActiGraph in children and comparison with the GT1M ActiGraph JO - J Sci Med Sport VL - 16 UR - https://doi.org/10.1016/j.jsams.2012.05.012 DO - 10.1016/j.jsams.2012.05.012 ID - Hanggi2013 ER - TY - JOUR AU - Evenson, K. R. AU - Catellier, D. J. AU - Gill, K. AU - Ondrak, K. S. AU - McMurray, R. G. PY - 2008 DA - 2008// TI - Calibration of two objective measures of physical activity for children JO - J Sports Sci VL - 26 UR - https://doi.org/10.1080/02640410802334196 DO - 10.1080/02640410802334196 ID - Evenson2008 ER - TY - JOUR AU - Trost, S. G. AU - Loprinzi, P. D. AU - Moore, R. AU - Pfeiffer, K. A. PY - 2011 DA - 2011// TI - Comparison of accelerometer cut points for predicting activity intensity in youth JO - Med Sci Sports Exerc VL - 43 UR - https://doi.org/10.1249/MSS.0b013e318206476e DO - 10.1249/MSS.0b013e318206476e ID - Trost2011 ER - TY - BOOK AU - Field, A. PY - 2009 DA - 2009// TI - Discovering statistics using SPSS: 3rd ed PB - Sage Publications CY - London ID - Field2009 ER - TY - BOOK AU - Streiner, D. I. AU - Norman, G. R. PY - 2003 DA - 2003// TI - Health measurement scales: a practical guide to their development and use PB - Oxford University Press CY - Oxford ID - Streiner2003 ER - TY - JOUR AU - Landis, J. R. AU - Koch, G. G. PY - 1977 DA - 1977// TI - The measurement of observer agreement for categorical data JO - Biometrics VL - 33 UR - https://doi.org/10.2307/2529310 DO - 10.2307/2529310 ID - Landis1977 ER - TY - STD TI - Telford A, Salmon J, Jolley D, Crawford D. Reliability and validity of physical activity questionnaires for children: the children's leisure activities study survey (CLASS). Ped Exerc Sci. 2004;16(1):64–78. ID - ref22 ER -