RT Journal Article T1 Changes in Physical Activity Patterns from Childhood to Adolescence: Genobox Longitudinal Study. A1 Llorente-Cantarero, Francisco Jesus A1 Aguilar-Gomez, Francisco Javier A1 Anguita-Ruiz, Augusto A1 Ruperez, Azahara Iris A1 Vazquez-Cobela, Rocio A1 Flores-Rojas, Katherine A1 Aguilera, Concepcion M A1 Gonzalez-Gil, Esther M A1 Gil-Campos, Mercedes A1 Bueno-Lozano, Gloria A1 Leis, Rosaura K1 Childhood K1 Obesity K1 Physical activity K1 Pubertal status K1 Sedentary time AB Longitudinal changes of physical activity (PA) from childhood into adolescence have not been accurately described yet for the Spanish population. The aim of this study is to evaluate the changes of PA, assessed by accelerometry and anthropometric measures in a cohort of 213 children from the prepubertal to pubertal period, focusing on those with valid data from both time points (n = 75). Sedentary time (ST) increased about 50%, while all PA intensities declined from the pre-pubertal to pubertal period. Light PA (LPA) was the major contributor, decreasing by about 30%. Boys were more active than girls in both periods, but they showed a higher decline in PA, especially moderate-to-vigorous PA (MVPA). The proportion who reached the recommendation of 60 min of MVPA decreased by 33.3% in boys and 4.6% in girls. Children with obesity or overweight had lower MVPA than those with normal-weight in the pre-pubertal period, but no differences were found in the pubertal period. This study shows a decrease of PA and an increase of sedentarism in the transition from childhood to adolescence, particularly in boys. Regardless of body weight, adolescents tend to be less active. Therefore, prevention programs should be implemented to achieve optimal PA and reduce sedentarism during infancy considering the differences found by sex. PB MDPI YR 2020 FD 2020-10-02 LK http://hdl.handle.net/10668/16376 UL http://hdl.handle.net/10668/16376 LA en NO Llorente-Cantarero FJ, Aguilar-Gómez FJ, Anguita-Ruiz A, Rupérez AI, Vázquez-Cobela R, Flores-Rojas K, et al. Changes in Physical Activity Patterns from Childhood to Adolescence: Genobox Longitudinal Study. Int J Environ Res Public Health. 2020 Oct 2;17(19):722 DS RISalud RD Apr 10, 2025