Evaluation of Sedentary Behavior and Physical Activity Levels Using Different Accelerometry Protocols in Children from the GENOBOX Study Llorente Cantarero, Francisco Jesús Aguilera García, Concepción María Gil Hernández, Ángel Lifestyle Activity monitor Child Exercise This research was funded by the Plan Nacional de Investigacion Cientifica, Desarrollo e Innovacion Tecnologica (I + D + I), Instituto de Salud Carlos III-HealthResearchFunding (FONDOS FEDER) (PI11/02042, PI11/02059, PI11/01425; PI16/00871, PI16/01301, PI16/01205) and RETIC (Redes tematicas de investigacion cooperativa) (Red SAMID RD12/0026/0015). Angel Gil is funded by the Plan Propio de la Universidad de Granada with a Sabatical Program 2020-21. This paper will be included in Jose Manuel Jurado-Castro's doctorate, under the "Social and Legal Sciences Program" at the University of Cordoba, Spain. Background: Physical activity (PA) has acquired a significant relevance due to the health benefits associated with its practice. Accelerometers are an effective tool to assess PA; however, the diversity of cut-off points used to define different PA intensities through accelerometry could interfere in the interpretation of the findings among studies. Objectives: The present study aimed to examine the sedentary behavior (SB) and physical activity (PA) levels in children using six selected accelerometry protocols based on diverse cut-off points. Methods: Clinical examination, anthropometric measurements, and PA evaluation by accelerometry were assessed in 543 selected children (10 ± 2.4 years old) from the Spanish GENOBOX study. The ActiLife data scoring program was used to determine daily min spent in SB, and light, moderate, vigorous and moderate-vigorous PA using six validated accelerometry protocols differing in their cut-off points. Results: Very different estimations for SB and PA intensity levels were found in children, independently of the nonwear- time algorithm selected, and considering puberty stages, age and body mass index. The time spent in daily SB varied from 471 to 663.7 min, PA ranged from 141 to 301.6 min, and the moderate-vigorous PA was reported between 20.7 and 180.2 min. Conclusion: The choice of a particular accelerometry protocol considering these factors is important to evaluate SB or PA intensities to suit the characteristics of the sample researched. It seems necessary to establish future lines of research that include different analytical approaches to measure SB and PA by accelerometry based on standardized and validated methodology. 2021-12-10T12:40:17Z 2021-12-10T12:40:17Z 2021-11-24 info:eu-repo/semantics/article Llorente-Cantarero, F.J... [et al.]. Evaluation of Sedentary Behavior and Physical Activity Levels Using Different Accelerometry Protocols in Children from the GENOBOX Study. Sports Med - Open 7, 86 (2021). [https://doi.org/10.1186/s40798-021-00365-z] http://hdl.handle.net/10481/71998 10.1186/s40798-021-00365-z eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España Springer