Resumo

O presente estudo mensurou objetivamente o padrão do comportamento sedentário em escolares de uma cidade da região sul do Brasil. Amostra probabilística composta por 394 adolescentes selecionada em dez escolas públicas da cidade de Londrina/PR. O ponto de corte de 720 counts.min-1 para o vetor magnitude do acelerômetro ActiGraph foi utilizado para estimar o tempo sedentário total, bouts (1-4 min, 5-9 min, 10-14 min, 15-29 min e ≥ 30 min) e breaks ao longo da semana, durante dias de semana e defi nais de semana, bem como no tempo na escola e fora da escola. Adolescentes gastaram cerca de 10 horas diárias em comportamento sedentário. Do tempo sedentário registrado em bouts, cerca de 50% (278 de 535 minutos) foram acumulados em bouts curtos (< 10 min). Comparativamente, adolescentes apresentaram maior tempo em bouts mais curtos (< 10 minutos) dentro da escola e maior tempo em bouts prolongados fora da escola (≥ 15 minutos) (p < 0,05). Tempo sedentário, tempo em bouts e número de breaks não foram in uenciados por sexo ou nível eco- nômico. Em conclusão, adolescentes brasileiros apresentam elevados níveis de tempo sedentário, apresentando um padrão mais desfavorável no ambiente não escolar.

Referências

1. Network SBR. Letter to the editor: Starndardized use of the terms “sedentary” and “sedentary behaviors.” Appl Physiol Nutr Metab. 2012;37:540–2. 
2. Saunders TJ, Chaput JP, Tremblay MS. Sedentary behaviour as an emerging risk factor for cardiometabolic diseases in children and youth. Can J Diabetes. 2014;38(1):53–61. 
3. Tremblay MS, Aubert S, Barnes JD, Saunders TJ, Carson V, Latimer-Cheung AE, et al. Sedentary behavior research network (SBRN) – Terminology consensus project process and outcome. Int J BehavNutr Phys Act. 2017;14:75. 
4. Cli DP, Jones RA, Burrows TL, Morgan PJ, Collins CE, Baur LA, et al. Volumes and bouts of sedentary behavior and physical activity: Associations with cardiometabolic health in obese children. Obesity. 2014;22(5):112–8. 
5. Júdice PB, Silva AM, Berria J, Petroski EL, Ekelund U, Sardinha LB. Sedentary patterns, physical activity and health-related physical fitness in youth: a cross-sectional study. Int J BehavNutr Phys Act. 2017;14(1):25. 
6. Saunders TJ, Tremblay MS, Mathieu MÈ, Henderson M, O’Loughlin J, Tremblay A, et al. Associations of sedentary behavior, sedentary bouts and breaks in sedentary time with cardiometabolic risk in children with a family history of obesity. PLoS One. 2013;8(11). 
7. Cliff DP, Hesketh KD, Vella SA, Hinkley T, Tsiros MD, Ridgers ND, et al. Objectively measured sedentary behaviour and health and development in children and adolescents: Systematic review and meta-analysis. Obes Rev. 2016;17(4):330–44. 
8. Australian Goverment DH. Australia’s Physical Activity and Sedentary Behaviour Guidelines for Children. url:http:// www.health.gov.au/ internet/main/publishing.nsf/content/ health-pubhlth-strategphys-act-guidelines#apa512. 2017. 
9. Verloigne M, Ridgers ND, Chinapaw M, Altenburg TM, Bere E, Van Lippevelde W, et al. Patterns of objectively measured sedentary time in 10- to 12-year-old Belgian children: an observational study within the ENERGY- project. BMC Pediatr. 2017;17(1):147. 
10. Carson V, Cliff DP, Janssen X, Okely AD. Longitudinal levels and bouts of sedentary time among adolescent girls. BMC Pediatr. 2013;13(1):173. 
11. Guerra PH, Farias Júnior JC de, Florindo AA. Sedentary behavior in Brazilian children and adolescents: a systematic review. Rev Saude Publica. 2016;50:1–15. 
12. Costa BGG, Silva KS, George AM, Assis MAA. Sedentary behavior during school-time: Sociodemographic, weight status, physical education class, and school performance correlates in Brazilian schoolchildren. J Sci Med Sport. 2017;20(1):70–4. 
13. Abbott RA, Straker LM, Mathiassen SE. Patterning of children’s sedentary time at and away from school. Obesity. 2013;21(1):2012–4. 
14. Harrington DM, Dowd KP, Bourke AK, Donnelly AE. Cross-Sectional analysis of levels and patterns of objectively measured sedentary time in adolescent females. Int J Behav Nutr Phys Act. 2011;8(1):120. 
15. Steele RM, van Sluijs EM, Sharp SJ, Landsbaugh JR, Ekelund U, Griffin SJ. An investigation of patterns of children’s sedentary and vigorous physical activity throughout the week. Int J BehavNutr Phys Act. 2010;7(1):88. 
16. Gordon CC. Stature, recumbent length, and weight. In: Anthropometric standardization reference manual. 1988. p. 3–8. 
17. Cole TJ, Lobstein T. Extended international (IOTF) body mass index cut-offs for thinness, overweight and obesity. Pediatr Obes. 2012;7(4):284–94. 
18. ABEP- Associação Brasiliera de Empresas de Pesquisa. Critérios de Classicação Econômica Brasil. São Paulo: 2015. Disponível em: http://www.abep.org/criterio-brasil. 2015. 
19. Kim Y, Lee JM, Peters BP, Gaesser GA,Welk GJ. Examination of different accelerometer cut-points for assessing sedentary behaviors in children. PLoS One. 2014;9(4):1–8. 
20. Romanzini M, Petroski EL, Ohara D, Dourado AC, Reichert FF. Calibration of ActiGraph GT3X, Actical and RT3 accelerometers in adolescents. Eur J Sport Sci. 2014;14(1):91–9. 
21. Altenburg TM, Chinapaw MJM. Bouts and breaks in children’s sedentary time: Currently used operational definitions and recommendations for future research. Prev Med. 2015;77:1–3. 
22. Healy G, Dunstan DW, Salmon J, Cerin E, Shaw J, Zimmet P, et al. Beneficial associations with metabolic risk. Diabetes Care. 2008;31(4):661–6. 
23. Carson V, Stone M, Faulkner G. Patterns of Sedentary Behavior and Weight Status among Children. Pediatr Exerc Sci. 2014;26(1):95–102. 
24. Marc T Hamilton, Deborah G Hamilton TWZ. NIH Public Access. Exerc Sport Sci Rev. 2004;32(4):161–6. 
25. Minges KE, Chao AM, Irwin ML, Owen N, Park C, Whittemore R, et al. Classroom Standing Desks and Sedentary Behavior: A Systematic Review. Pediatrics. 2016;137(2):e20153087–e20153087. 
26. Altenburg TM, Kist-van Holthe J, Chinapaw MJM. Effectiveness of intervention strategies exclusively targeting reductions in children’s sedentary time: a systematic review of the literature. Int J BehavNutr Phys Act. 2016;13(1):65. 
27. Evenson KR, Catellier DJ, Gill K, Ondrak KS, McMurray RG. Calibration of two objective measures of physical activity for children. J Sports Sci. 2008;26(14):1557–65.

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