2134/35704 Aron Sherry Aron Sherry Natalie Pearson Natalie Pearson Nicola Ridgers Nicola Ridgers Sally E. Barber Sally E. Barber Daniel D. Bingham Daniel D. Bingham Liana C. Nagy Liana C. Nagy Stacy Clemes Stacy Clemes ActivPAL-measured sitting levels and patterns in 9-10 year old children from a UK city. Loughborough University 2018 Children Chronic disease Public health Medical and Health Sciences not elsewhere classified 2018-11-02 12:20:07 Journal contribution https://repository.lboro.ac.uk/articles/journal_contribution/ActivPAL-measured_sitting_levels_and_patterns_in_9-10_year_old_children_from_a_UK_city_/9611123 Background: There is insufficient evidence of sitting time in UK children from validated objective measures. This study explored sitting patterns in primary school children from Bradford, UK, using the validated activPAL inclinometer. Methods: Overall, 79 children (9.8 (SD 0.3) years old, 52% boys; 70% South Asian) wore activPALs for 7 days. Total sitting time, sitting time accumulated in different bout lengths, and the proportion of wear time spent in these variables were explored and compared across different periods of the week. Results: Children spent 614 ± 112 (median ± IQR) min/day on school days and 690 ± 150 min/day on weekend days sitting. The proportion of time spent sitting was significantly higher on weekend days compared to school days (mean±SD: 74 ± 10% versus 68 ± 8%,P < 0.001), as was the proportion of time accumulated in >30 min sitting bouts (mean±CI: 28 ± 27-33% versus 20 ± 20-22%, P < 0.001). The proportion of time spent sitting after school was significantly higher than during school time (mean±SD: 70 ± 8.4% versus 63 ± 8.3%,P < 0.001), as was the proportion of time spent in prolonged (>30 min) sitting bouts (mean±CI: 19 ± 16-22% versus 11 ± 10-14%, P < 0.001). Conclusions: Children spent large proportions of their waking day sitting, often accumulated in prolonged uninterrupted bouts and particularly after school and on weekends. Interventions to reduce sitting time in children are urgently needed.