Dr Katrina Champion is a Senior Research Fellow at The Matilda Centre for Research in Mental Health and Substance Use and School of Public Health at the University of Sydney. She holds a Bachelor of Arts-Psychology(Hons)/Bachelor of Health and a PhD in Public Health and Community Medicine. She is Program Lead of Healthy Lifestyles Research at the Matilda Centre and holds a prestigious Sydney Horizon Fellowship. Dr Champion works at the nexus of disease prevention and mental health, with a focus on the bidirectional relationships between poor mental health and unhealthy lifestyle. She develops, evaluates and disseminates digital interventions to improve both physical and mental health in adolescents.