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Table 4 Summary table of results showing relation between sedentary behaviour and fitness

From: Systematic review of sedentary behaviour and health indicators in school-aged children and youth

Type of Study Number of Studies Number of participants Narrative recommendation and main findings
RCT 0   
Intervention 1 76 Reductions in sedentary behaviour lead to increased fitness.
Longitudinal 2 561 One study showed no association whereas one study showed higher musculoskeletal fitness in those watching < 2 hrs of TV per day.
Cross sectional 12 17227 > 2 hrs of screen time per day is associated with better VO2max scores, better musculoskeletal and cardiorespiratory fitness scores.
Total of all studies 15 17864 Those watching less than 2 hours of TV a day showed higher results for fitness testing and more favourable bone health.
Mean Downs and Black score = 20.6 (± 2.1), Level 3 evidence.