I am an Associate Professor in Public Health in the Norwich Medical School and Public Health theme lead for the MBBS (medical) programme. In this role, I teach medical students about the importance and principles of public health, and particularly the primary prevention of chronic disease. My research area is physical activity and health, in which I aim to advance knowledge and understanding of ‘what works’ to get populations more active to reduce the burden of noncommunicable diseases. My interest in this field spans the measurement of physical activity, population level interventions, evaluation and policy research. I am President-elect of the International Society for Physical Activity and Health (ISPAH) and have acted as an advisor to a range of national and international health promotion agencies including the Australian Heart Foundation, the Department of Health in England, and the World Health Organization (Regional Offices for Europe and the Eastern Mediterranean and WHO Headquarters, Geneva). I was on the Strategic Advisory Network for the development of the WHO Global Action Plan on Physical Activity 2018 – 2030 and a member of the Guideline Development Group for the 2020 WHO physical activity and sedentary behaviour guidelines.