Stuart Biddle is Professor of Physical Activity and Health in the Centre for Health Research at the University of Southern Queensland, near Brisbane, Australia. He is a visiting or honorary professor at The University of Queensland and Baker Heart & Diabetes Institute in Australia, as well as at Loughborough University (UK), and University of Jyväskylä (Finland).

Nanette Mutrie is Professor Emerita with the Physical Activity for Health Research Centre at the University of Edinburgh, Scotland.

Trish Gorely is Professor of Physical Activity for Health in the Centre for Rural Health Sciences at the University of the Highlands and Islands, Inverness, Scotland.

Guy Faulkner is Professor and Chair in Applied Public Health and leads the Population Physical Activity (Pop PA) Lab in the School of Kinesiology at the University of British Columbia, Canada.

Section 1: Understanding Psychology for Increasing Physical Activity 1. Physical Activity and Sedentary Behaviour: Setting the Scene 2. Physical Activity, Motivation, and Mental Health 3. Physical and Social Environments 4. Behaviour Change: Frameworks and Techniques Section 2: Applying Psychology in Different Settings: Eight Best Investments 5. Active Travel 6. Active Urban Design 7. Healthcare 8. Public Education, Including Mass Media 9. Sport and Recreation for All 10. Workplaces 11. Community-Wide Programmes 12. Whole-of-School Programmes Section 3: Summary 13. Bringing It All Together