PUBLIC HEALTH RESEARCH VOLUME 4 ISSUE 7 JUNE 2016 ISSN 2050-4381 DOI 10.3310/phr04070 Active for Life Year 5: a cluster randomised controlled trial of a primary school-based intervention to increase levels of physical activity, decrease sedentary behaviour and improve diet Debbie A Lawlor, Ruth R Kipping, Emma L Anderson, Laura D Howe, Catherine R Chittleborough, Aida Moure-Fernandez, Sian M Noble, Emma Rawlins, Sian L Wells, Tim J Peters, Russell Jago and Rona Campell