Veronica J. Poitras|Casey Gray|Xanne Janssen|Salomé Aubert|Valerie Carson|Guy Faulkner|Gary S. Goldfield|John J. Reilly|Margaret Sampson|Mark S. Tremblay
Systematic review of the relationships between sedentary behaviour and health indicators in the early years (0–4 years)
Children's Hospital of Eastern Ontario|Children's Hospital of Eastern Ontario|University of Strathclyde|Children's Hospital of Eastern Ontario|University of Alberta|University of British Columbia|Children's Hospital of Eastern Ontario|University of Strathclyde|Children's Hospital of Eastern Ontario|Children's Hospital of Eastern Ontario
purpose systematic review examine relationships sedentary behaviour sb health indicators children aged 0 4 years determine doses sb ie duration patterns frequency interruptions type associated health indicatorsonline databases searched peerreviewed studies met priori inclusion criteria population apparently healthy 1 month 499 years interventionexposure comparator durations patterns types sb outcomehealth indicator critical adiposity motor development psychosocial health cognitive development important bone skeletal health cardiometabolic health fitness risksharm quality evidence assessed study design outcome using grading recommendations assessment development evaluation grade frameworkdue heterogeneity metaanalyses possible instead narrative syntheses conducted structured around health indicator type sb total 96 studies included 195430 participants 33 countries study designs randomized controlled trial n 1 casecontrol n 3 longitudinal n 25 longitudinal additional crosssectional analyses n 5 crosssectional n 62 evidence quality ranged low moderate associations objectively measured total sedentary time indicators adiposity motor development predominantly null associations screen time indicators adiposity motor cognitive development psychosocial health primarily unfavourable null associations readingstorytelling indicators cognitive development favourable null associations time spent seated eg car seats strollers supine position indicators adiposity motor development primarily unfavourable null data scarce outcomesthese findings continue support importance minimizing screen time disease prevention health promotion early years also highlight potential cognitive benefits interactive nonscreenbased sedentary behaviours reading storytelling additional highquality research using valid reliable measures needed definitively establish relationships durations patterns types sb health indicators provide insight appropriate dose sb optimal health early years