Relationship between Sedentary Time, Physical Activity, and Health-Related Quality of Life in Spanish Children Ávila García, Manuel Esojo Rivas, María Villa González, Emilio Tercedor Sánchez, Pablo Huertas Delgado, Francisco Javier Quality of life Physical activity Sedentary time Sex School Higher sedentary time and lower physical activity (PA) are associated with a poor healthrelated quality of life (HRQoL) in children. The aims of this study were: (1) to analyze the sedentary time, objectively measured PA levels (light, moderate, vigorous, and moderate-to-vigorous physical activity (MVPA)), and HRQoL dimensions (physical well-being, emotional well-being, self-esteem, family, friends, school, and total score) in children; and (2) to examine the association between sedentary time, PA levels, and HRQoL in children separately by sex. A total of 459 children (8.4 ± 0.4 years old, 50.54% males) from 15 schools in Granada (Spain) participated in the study. A tri-axial accelerometer was used to measure PA levels in the children for 7 consecutive days. The Revidierter KINDer Lebensqualitätsfragebogen (KINDL-R) questionnaire was used to determine the children’s HRQoL dimensions. The results showed that males presented more minutes engaged in MVPA than females. Both sedentary time and PA levels were associated with self-esteem and total score (all p < 0.05). In males, moderate and vigorous PA levels were associated with higher HRQoL, whereas light PA was associated with higher HRQoL in females. Future studies should take into account the use of activities with difference intensities in order to increase HRQoL in males and females. 2021-04-21T10:51:07Z 2021-04-21T10:51:07Z 2021 info:eu-repo/semantics/article Ávila-García, M.; Esojo-Rivas, M.; Villa-González, E.; Tercedor, P.; Huertas-Delgado, F.J. Relationship between Sedentary Time, Physical Activity, and Health-Related Quality of Life in Spanish Children. Int. J. Environ. Res. Public Health 2021, 18, 2702. https://doi.org/10.3390/ ijerph18052702 http://hdl.handle.net/10481/68040 10.3390/ijerph18052702 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España MDPI