TY - JOUR AU - Grao-Cruces, Alberto AU - Velázquez-Romero, María J. AU - Rodríguez-Rodríguez, Fernando PY - 2020 DO - 10.3390/ijerph17134773 SN - 1661-7827 UR - http://hdl.handle.net/10668/3858 T2 - International Journal of Environmental Research and Public Health AB - Background: This systematic review determines the levels of physical activity (PA) during school hours in children and adolescents. Methods: Studies carried out from January 1987 to December 2019 were retrieved from four databases (Web of Science,... LA - en PB - MDPI KW - Primary education KW - Secondary education KW - School schedule KW - Recommendations KW - Students KW - Educación primaria y secundaria KW - Citas y programación KW - Estudiantes KW - Directrices para la planificación en salud KW - Búsqueda sistemática KW - Medical Subject Headings::Persons::Persons::Age Groups::Adolescent KW - Medical Subject Headings::Persons::Persons::Age Groups::Child KW - Medical Subject Headings::Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Epidemiologic Study Characteristics as Topic::Epidemiologic Studies::Cross-Sectional Studies KW - Medical Subject Headings::Check Tags::Female KW - Medical Subject Headings::Organisms::Eukaryota::Animals::Chordata::Vertebrates::Mammals::Primates::Haplorhini::Catarrhini::Hominidae::Humans KW - Medical Subject Headings::Check Tags::Male KW - Medical Subject Headings::Anthropology, Education, Sociology and Social Phenomena::Human Activities::Exercise KW - Medical Subject Headings::Anthropology, Education, Sociology and Social Phenomena::Education::Schools KW - Medical Subject Headings::Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Accelerometry TI - Levels of Physical Activity during School Hours in Children and Adolescents: A Systematic Review TY - review article ER -