Systematic review of sedentary behaviour and health indicators in the early years (aged 0-4 years)

摘要

Accumulating evidence suggests that young children spend excessive time being sedentary. The purpose of thisnsystematic review was to determine the relationship between sedentary behaviours and health indicators during the earlynyears (ages 0–4 years). Using the Grading of Recommendations Assessment, Development, and Evaluation (GRADE)nframework, this review aimed to present the best available evidence on the threshold of sedentary behaviour associated withnhealthy measures of adiposity, bone health, motor skill development, psychosocial health, cognitive development, and cardiometabolicnhealth indicators in infants, toddlers, and preschoolers. Online databases, personal libraries, and governmentndocuments were searched for relevant studies. Studies that included an intervention (or experimental) group or prospectivenanalysis were included. Twenty-one unique studies, representing 23 papers and 22 417 participants, met inclusionncriteria; 7 studies included information on infants, 13 on toddlers, and 10 on preschoolers. Of these, 11, 6, and 8 studiesnreported data on adiposity, psychosocial health, and cognitive development, respectively. No included study reportednon motor skill development, bone, or cardiometabolic health indicators. In conclusion, this review found low- to moderate-nquality evidence to suggest that increased television viewing is associated with unfavourable measures of adipositynand decreased scores on measures of psychosocial health and cognitive development. No evidence existed to indicatenthat television viewing is beneficial for improving psychosocial health or cognitive development. In several instances andose–response relationship was evident between increased time spent watching television and decreased psychosocialnhealth or cognitive development. This work may be used as evidence to inform public health guidelines. (PROSPEROnregistration: CRD4011001280.)