Lee IM, Shiroma EJ, Lobelo F, Puska P, Blair SN, Katzmarzyk PT: Effect of physical inactivity on major non-communicable diseases worldwide: an analysis of burden of disease and life expectancy. Lancet. 2012, 380: 219-229. 10.1016/S0140-6736(12)61031-9.
Article
PubMed
PubMed Central
Google Scholar
Hallal PC, Victora CG, Azevedo MR, Wells JCK: Adolescent physical activity and health - A systematic review. Sports Med. 2006, 36: 1019-1030. 10.2165/00007256-200636120-00003.
Article
PubMed
Google Scholar
Lee IM, Skerrett PJ: Physical activity and all-cause mortality: what is the dose–response relation?. Med Sci Sports Exerc. 2001, 33: S459-S471. 10.1097/00005768-200106001-00016.
Article
CAS
PubMed
Google Scholar
World Health Organization: Global Health Risks: mortality and burden of disease attributable to selected major risks. 1–70. 2009, Geneva, Switzerland: WHO
Google Scholar
Beaglehole R, Bonita R, Horton R, Adams C, Alleyne G, Asaria P, Baugh V, Bekedam H, Billo N, Casswell S, Cecchini M, Colagiuri R, Colagiuri S, Collins T, Ebrahim S, Engelgau M, Galea G, Gaziano T, Geneau R, Haines A, Hospedales J, Jha P, Keeling A, Leeder S, Lincoln P, Mckee M, Mackay J, Magnusson R, Moodie R, Mwatsama M, Nishtar S, Norrving B, Patterson D, Piot P, Ralston J, Rani M, Reddy KS, Sassi F, Sheron N, Stuckler D, Suh I, Torode J, Varghese C, Watt J: Priority actions for the non-communicable disease crisis. Lancet. 2011, 377: 1438-1447. 10.1016/S0140-6736(11)60393-0.
Article
PubMed
Google Scholar
Strong WB, Malina RM, Blimkie CJR, Daniels SR, Dishman RK, Gutin B, Hergenroeder AC, Must A, Nixon PA, Pivarnik JM, Rowland T, Trost S, Trudeau FO: Evidence based physical activity for school-age youth. J Pediatr. 2005, 146: 732-737. 10.1016/j.jpeds.2005.01.055.
Article
PubMed
Google Scholar
Janssen I, LeBlanc AG: Systematic review of the health benefits of physical activity and fitness in school-aged children and youth. Int J Behav Nutr Phys Act. 2010, 7: 40-10.1186/1479-5868-7-40.
Article
PubMed
PubMed Central
Google Scholar
Ekelund U, Tomkinson GR, Armstrong N: What proportion of youth are physically active? Measurement issues, levels and recent time trends. Br J Sports Med. 2011, 45: 859-865. 10.1136/bjsports-2011-090190.
Article
PubMed
Google Scholar
Guthold R, Cowan MJ, Autenrieth CS, Kann L, Riley LM: Physical activity and sedentary behavior among schoolchildren: a 34-country comparison. J Pediatr. 2010, 157: 43-U84. 10.1016/j.jpeds.2010.01.019.
Article
PubMed
Google Scholar
Patton GC, Coffey C, Cappa C, Currie D, Riley L, Gore F, Degenhardt L, Richardson D, Astone N, Sangowawa AO, Mokdad A, Ferguson J: Adolescent Health 4 Health of the world’s adolescents: a synthesis of internationally comparable data. Lancet. 2012, 379: 1665-1675. 10.1016/S0140-6736(12)60203-7.
Article
PubMed
Google Scholar
Patton GC, Coffey C, Sawyer SM, Viner RM, Haller DM, Bose K, Vos T, Ferguson J, Mathers CD: Global patterns of mortality in young people: a systematic analysis of population health data. Lancet. 2009, 374: 881-892. 10.1016/S0140-6736(09)60741-8.
Article
PubMed
Google Scholar
Hallal PC, Andersen LB, Bull FC, Guthold R, Haskell W, Ekelund U: Global physical activity levels: surveillance progress, pitfalls, and prospects. Lancet. 2012, 380: 247-257. 10.1016/S0140-6736(12)60646-1.
Article
PubMed
Google Scholar
Armstrong N, Welsman JR: The physical activity patterns of European youth with reference to methods of assessment. Sports Med. 2006, 36: 1067-1086. 10.2165/00007256-200636120-00005.
Article
PubMed
Google Scholar
Armstrong T, Bull F: Development of the World Health Organization Global Physical Activity Questionnaire (GPAQ). J Public Health. 2006, 14: 66-70. 10.1007/s10389-006-0024-x.
Article
Google Scholar
Hallal PC, Fernando Gomez L, Parra DC, Lobelo F, Mosquera J, Florindo AA, Reis RS, Pratt M, Sarmiento OL: Lessons Learned After 10 Years of IPAQ Use in Brazil and Colombia. J Phys Act Health. 2010, 7: S259-S264.
PubMed
Google Scholar
Oyeyemi AL, Oyeyemi AY, Adegoke BO, Oyetoke FO, Aliyu HN, Aliyu SU, Rufai AA: The short international physical activity questionnaire: cross-cultural adaptation, validation and reliability of the Hausa language version in Nigeria. Bmc Med Res Methodol. 2011, 11: 156-10.1186/1471-2288-11-156.
Article
PubMed
PubMed Central
Google Scholar
Krishnaveni GV, Mills IC, Veena SR, Wootton SA, Wills AK, Coakley PJ, Fisher DJ, Shobha S, Karat SC, Fall CHD: Accelerometers for Measuring Physical Activity Behavior in Indian Children. Indian Pediatr. 2009, 46: 1055-1062.
CAS
PubMed
Google Scholar
Lachat CK, Verstraeten R, Khanh LNB, Hagstromer M, Khan NC, Van NDA, Dung NQ, Kolsteren PW: Validity of two physical activity questionnaires (IPAQ and PAQA) for Vietnamese adolescents in rural and urban areas. Int J Behav Nutr Phys Act. 2008, 5: 37-10.1186/1479-5868-5-37.
Article
PubMed
PubMed Central
Google Scholar
Platat C, Jarrar A: Reliability and validity of a physical activity questionnaire in children. Int J Food Sci Nutr. 2012, 63: 637-644. 10.3109/09637486.2011.644766.
Article
PubMed
Google Scholar
Hallal PC, Matsudo S, Farias JC: Measurement of physical activity by self-report in low- and middle-income countries: more of the same is not enough. J Phys Act Health. 2012, 9: S88-S90.
PubMed
Google Scholar
Matthews CE, Hagstromer M, Pober DM, Bowles HR: Best Practices for Using Physical Activity Monitors in Population-Based Research. Med Sci Sports Exerc. 2012, 44: S68-S76.
Article
PubMed
PubMed Central
Google Scholar
Hagstromer M, Ainsworth BE, Kwak L, Bowles HR: A Checklist for Evaluating the Methodological Quality of Validation Studies on Self-Report Instruments for Physical Activity and Sedentary Behavior. J Phys Act Health. 2012, 9: S29-S36.
PubMed
Google Scholar
Cole TJ, Bellizzi MC, Flegal KM, Dietz WH: Establishing a standard definition for child overweight and obesity worldwide: international survey. Br Med J. 2000, 320: 1240-1243. 10.1136/bmj.320.7244.1240.
Article
CAS
Google Scholar
Cole TJ, Flegal KM, Nicholls D, Jackson AA: Body mass index cut offs to define thinness in children and adolescents: international survey. Br Med J. 2007, 335: 194-197. 10.1136/bmj.39238.399444.55.
Article
Google Scholar
Bouchard CA, Tremblay C, Leblanc G, Lortie R, Savard R, Thériault G: A method to assess energy expenditure in children and adults. Am J Clin Nutr. 1983, 37: 461-467.
CAS
PubMed
Google Scholar
Ridley K, Ainsworth BE, Olds TS: Development of a Compendium of Energy Expenditures for Youth. Int J Behav Nutr Phys Act. 2008, 5: 45-10.1186/1479-5868-5-45.
Article
PubMed
PubMed Central
Google Scholar
Pate RR, O’Neill JR, Lobelo F: The evolving definition of “sedentary”. Exerc Sport Sci Rev. 2008, 36: 173-178. 10.1097/JES.0b013e3181877d1a.
Article
PubMed
Google Scholar
Ridley K, Olds TS: Assigning energy costs to activities in children: a review and synthesis. Med Sci Sports Exerc. 2008, 40: 1439-1446. 10.1249/MSS.0b013e31817279ef.
Article
PubMed
Google Scholar
Kozey SL, Staudenmayer JW, Troiano RP, Freedson PS: Comparison of the ActiGraph 7164 and the ActiGraph GT1M during Self-Paced Locomotion. Med Sci Sports Exerc. 2010, 42: 971-976. 10.1249/MSS.0b013e3181c29e90.
Article
PubMed
PubMed Central
Google Scholar
Troiano RP, Dodd KW: Within-Person Differences in Physical Activity Measured by Self-Report and Accelerometer in NHANES 2003–2004. Med Sci Sports Exerc. 2008, 40: S203-
Article
Google Scholar
Freedson P, Pober D, Janz KF: Calibration of accelerometer output for children. Med Sci Sports Exerc. 2005, 37: S523-S530. 10.1249/01.mss.0000185658.28284.ba.
Article
PubMed
Google Scholar
Matthews CE, Chen KY, Freedson PS, Buchowski MS, Beech BM, Pate RR, Troiano RP: Amount of time spent in sedentary behaviors in the united states, 2003–2004. Am J Epidemiol. 2008, 167: 875-881. 10.1093/aje/kwm390.
Article
PubMed
PubMed Central
Google Scholar
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: 1360-1368. 10.1249/MSS.0b013e318206476e.
Article
PubMed
Google Scholar
Froot KA: Consistent covariance matrix estimation with cross-sectional dependence and heteroskedasticity in financial data. J Financ Quant Anal. 1989, 24: 333-355. 10.2307/2330815.
Article
Google Scholar
Bland JM, Altman DG: Measuring agreement in method comparison studies. Stat Methods Med Res. 1999, 8: 135-160. 10.1191/096228099673819272.
Article
CAS
PubMed
Google Scholar
Landis JR, Koch GG: The measurement of observer agreement for categorical data. Biometrics. 1977, 33: 159-174. 10.2307/2529310.
Article
CAS
PubMed
Google Scholar
Sim J, Wright CC: The kappa statistic in reliability studies: use, interpretation, and sample size requirements. Phys Ther. 2005, 85: 257-268.
PubMed
Google Scholar
Adamo KB, Prince SA, Tricco AC, Connor-Gorber S, Tremblay M: A comparison of indirect versus direct measures for assessing physical activity in the pediatric population: a systematic review. Int J Pediatr Obes. 2009, 4: 2-27. 10.1080/17477160802315010.
Article
PubMed
Google Scholar
Anderson CB, Hagstromer M, Yngve A: Validation of the PDPAR as an adolescent diary: effect of accelerometer cut points. Med Sci Sports Exerc. 2005, 37: 1224-1230. 10.1249/01.mss.0000170073.57440.df.
Article
PubMed
Google Scholar
Bailey RC, Olson J, Pepper SL, Porszasz J, Barstow TJ, Cooper DM: The Level and Tempo of Childrens Physical Activities - An Observational Study. Med Sci Sports Exerc. 1995, 27: 1033-1041. 10.1249/00005768-199507000-00012.
Article
CAS
PubMed
Google Scholar
Treuth MS, Schmitz K, Catellier DJ, McMurray RG, Murray DM, Almeida MJ, Going S, Norman JE, Pate R: Defining accelerometer thresholds for activity intensities in adolescent girls. Med Sci Sports Exerc. 2004, 36: 1259-1266.
Article
PubMed
PubMed Central
Google Scholar
Ottevaere C, Huybrechts I, De Bourdeaudhuij I, Sjostrom M, Ruiz JR, Ortega FB, Hagstromer M, Widhalm K, Molnar D, Moreno LA, Beghin L, Kafatos A, Polito A, Manios Y, Martinez-Gomez D, De Henauw S: Comparison of the IPAQ-A and Actigraph in relation to VO(2)max among European adolescents: The HELENA study. J Sci Med Sport. 2011, 14: 317-324. 10.1016/j.jsams.2011.02.008.
Article
PubMed
Google Scholar
Ekelund U, Neovius M, Linne Y, Rossner S: The criterion validity of a last 7-day physical activity questionnaire (SAPAQ) for use in adolescents with a wide variation in body fat: the Stockholm Weight Development Study. Int J Obes. 2006, 30: 1019-1021. 10.1038/sj.ijo.0803207.
Article
CAS
Google Scholar
Cust AE, Armstrong BK, Smith BJ, Chau J, van der Ploeg HP, Bauman A: Self-reported Confidence in Recall as a Predictor of Validity and Repeatability of Physical Activity Questionnaire Data. Epidemiology. 2009, 20: 433-441. 10.1097/EDE.0b013e3181931539.
Article
PubMed
Google Scholar
Corder K, van Sluijs EMF, Wright A, Whincup P, Wareham NJ, Ekelund U: Is it possible to assess free-living physical activity and energy expenditure in young people by self-report?. Am J Clin Nutr. 2009, 89: 862-870. 10.3945/ajcn.2008.26739.
Article
CAS
PubMed
Google Scholar
Zaki R, Bulgiba A, Ismail R, Ismail NA: Statistical methods used to test for agreement of medical instruments measuring continuous variables in method comparison studies: a systematic review. PLoS ONE. 2012, 7: e37908-10.1371/journal.pone.0037908. doi: 10.1371/journal.pone.0037908
Article
CAS
PubMed
PubMed Central
Google Scholar