|Type of Study||Number of Studies||Number of participants||Narrative recommendation and main findings|
|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.