[BMJ Publishing Group Ltd Society for Social Medicine and Population Health and International Epidemiology Association European Congress Annual Scientific Meeting 2019, Hosted by the Society for Social Medicine & Population Health and International Epidemiology Association (IEA), School of Public Health, University College Cork, Cork, Ireland, 4–6 September 2019 - ()] Oral Presentations - OP67 The physical activity wearables in the police force (PAW-force) trial: feasibility, acceptability and impact