RT Journal Article T1 Study protocol of a population-based cohort investigating Physical Activity, Sedentarism, lifestyles and Obesity in Spanish youth: the PASOS study. A1 Gómez, Santiago Felipe A1 Homs, Clara A1 Wärnberg, Julia A1 Medrano, Maria A1 Gonzalez-Gross, Marcela A1 Gusi, Narcis A1 Aznar, Susana A1 Cascales, Elena Marín A1 González-Valeiro, Miguel A1 Serra-Majem, Lluis A1 Terrados, Nicolás A1 Tur, Josep A A1 Segú, Marta A1 Lassale, Camille A1 Benavente-Marín, Juan Carlos A1 Labayen, Idoia A1 Zapico, Augusto García A1 Sánchez-Gómez, Jesús A1 Jiménez-Zazo, Fabio A1 Alcaraz, Pedro Emilio A1 Sevilla-Sanchez, Marta A1 Herrera-Ramos, Estefania A1 Pulgar, Susana A1 Bibiloni, Maria Del Mar A1 Sancho, Olga A1 Schröder, Helmut K1 community child health K1 epidemiology K1 public health AB Physical activity (PA) is essential to healthy mental and physical development in early life. However, the prevalence of physical inactivity, which is considered a key modifiable driver of childhood obesity, has reached alarming levels among European youth. There is a need to update the data for Spain, in order to establish if current measures are effective or new approaches are needed. We present the protocol for Physical Activity, Sedentarism, lifestyles and Obesity in Spanish youth (PASOS). This observational, nationally representative, multicentre study aims to determine the PA levels, sedentary behaviours and prevalence of physical inactivity (defined as The study was approved by the Ethics Committee of the Fundació Sant Joan de Déu, Barcelona, Spain. Main findings of the study will be disseminated to the scientific community and to general public by media conferences, social media and a website. ISRCTN34251612. YR 2020 FD 2020-09-23 LK http://hdl.handle.net/10668/16304 UL http://hdl.handle.net/10668/16304 LA en DS RISalud RD Apr 10, 2025