doi:10.1186/s40798-025-00865-2engJurado-Castro, Jose ManuelPastor-Villaescusa, BelénCastro-Collado, CristinaGil-Campos, MercedesLeis, RosauraBabio, NancyMoreno, Luis A.Navas-Carretero, SantiagoPortolés, OlgaEcheverría, Ana MoreiraDe La Torre-Aguilar, Maria JosePicáns-Leis, RosauraSalas-Salvadó, JordiMiguel-Etayo, Pilar deFlores-Rojas, KatherineVázquez-Cobela, RocíoSales, Júlia ValeroMiguel-Berges, Maria L.Izquierdo-López, IsabelGómez-Martínez, CarlosCórdoba-Rodríguez, Diana PaolaMimbrero, GiselaLlorente-Cantarero, Francisco JesusSchröder, HelmutMoreira, AnaFitó, MontsePérez-Vega, Karla A.Baltodano, Mayela SolisMuñoz-Aguayo, DanielBlanchart, GemmaGaixas, SòniaZomeño, María DoloresLorenzo, IsauryVillaescusa, Belén PastorAguayo, Inmaculada VelascoPanadero, José Luis CastilloPerea, Rafael BlancoDe la Guerra, SusanaBermell, Teresa EspinoSánchez, Francisca PorteroMartínez, J. AlfredoMoreno-Aliaga, Maria Jesúsde Cuevillas García, BegoñaGoñi, MaríaHernández, MaríaDiez, Salomé PérezCristobo, CarmenEscribano, JoaquínFeliu, AlbertClosas, RicardoLuque, VerónicaFerré, NataliaGheorghita, IrinaAlcázar, MireiaMartín, FranciscoRey, CristinaPedraza, AnaSalvadó, OlgaVelasco, Marta RuizSustacha, José Ángel BilbaoPinilla, Yolanda HerranzRios, LidiaCompte, María PascualGarcidueñas-Fimbres, Tany E.de las Heras-Delgado, SaraSimón, Olgade la Torre, SòniaTudela, CàrolGarcía, Sara MoroñoLópez-Rubio, AliciaPortoles, OlgaFranch, Pilar CodoñerCorella, DoloresCarbonell, Vanessa MartínSorlí, José V.Moreno, Luís A.Santaliestra-Pasias, Alba MaArgente-Arizon, PilarGimenez-Legarre, NataliaFlores-Barrantes, PalomaPérez-Gimeno, GloriaSeral-Cortés, MiguelMartinez, Andrea JimenoManeschy, IvieEvaluation of Physical Activity, Sedentary Patterns, and Lifestyle Behavior in Spanish Preschool Children from the CORALS CohortART-2025-144362Physical activity (PA) and sedentary lifestyle are recognized as modifiable risk factors for non-communicable diseases. Healthy habits in early childhood tend to persist throughout life. This study aims to evaluate the physical activity and sedentary behavior patterns in a cohort of Spanish preschool children using device-based measures, and compare these patterns by sex. This study analyzed a sample of 643 preschoolers aged 3–6 years with valid accelerometry data from the Childhood Obesity Risk Assessment Longitudinal Study (CORALS) cohort (NCT06317883; May 30, 2024). Results. 67% of preschoolers met the international PA recommendations, with 72.1 min of moderate-vigorous PA (MVPA) per day. Boys exhibited higher levels of MVPA than girls, and MVPA increased with age in both groups. Sedentary time was higher on weekends, and boys spent more time watching TV than girls. Involvement in extracurricular sports was reported by 67.5% of children, with boys showing a greater engagement in outdoor activities. Conclusions. A relevant proportion of Spanish preschool children meet the international PA recommendations, with variations based on sex, age, and day of the week, reflecting global trends at this stage of life. Future interventions should address sex-specific preferences and age-related changes to enhance the effectiveness of promoting active lifestyles in this population.2025http://zaguan.unizar.es/record/16168410.1186/s40798-025-00865-2http://zaguan.unizar.es/record/161684oai:zaguan.unizar.es:161684SPORTS MEDICINE-OPEN 11, 1 (2025)byhttps://creativecommons.org/licenses/by/4.0/deed.esinfo:eu-repo/semantics/openAccess