Dr Fiona Bull MBE is the Head of the Physical Activity Unit at the World Health Organization Headquarters providing global leadership on physical activity and supporting country implementation of the Global Action Plan on Physical Activity 2018-2030. Work includes developing capacity, extending global partnerships and policy coherence across intersecting areas and developing global guidelines, standards and technical tools, based on the latest scientific evidence and best practice experiences. With a focus on supporting low- and middle-income countries, the overall goals is to increase the opportunities and supportive environments that enable people of all ages and abilities to be regularly active. Before joining WHO, Fiona was Professor of Public Health and Physical Activity at the University of Western Australia, Director of the Centre for Built Environment and Health and previously Director of the National Centre for Physical Activity and Health in the UK. Her professional career spans over 30 years and covers developing global and national policy on physical activity, epidemiology of physical activity and health, digital innovations, and systems and settings approaches to national action on increasing physical activity.