Significance and relevance: Poor diet, physical inactivity and obesity are leading causes of mortality in New Zealand and major contributors to health-related inequalities. Our programme targets important determinants of these conditions and focuses on policy and practice-relevant interventions. Our research aligns with New Zealand health priorities and will inform national and international efforts to improve eating habits, increase physical activity, and prevent obesity. Programme vision and themes: Our programme vision is to improve population nutrition and physical activity behaviours through innovative, cost-effective interventions. The main programme themes are: population interventions with a focus on Maori and Pacific peoples; novel intervention and measurement technologies; strategic approach to research development; and capacity building of the nutrition and physical activity research workforce. Our programme consists of three core projects.