title: [Child physical fitness training].
mesh_terms: D002648:Child; D002657:Child Development / Q000502:physiology; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D010806:Physical Education and Training / Q000379:methods*; D010809:Physical Fitness; D013696:Temperature
vernacular_title: Hartowanie dziecka.