Ideas in ecological dynamics have profound implications for designing environments that offer opportunities for physical activity, exercise and play in sedentary individuals. They imply how exercise scientists, health professionals, planners, designers and engineers, and psychologists, can collaborate in co-designing environments and playscapes that facilitate physical activity and exercise behaviours in different population sub-groups. Here, we discuss how concepts in ecological dynamics emphasise the person-environment scale of analysis indicating how physical activity environments might be (re)designed into qualitative regions of functional significance (affordances) that invite health enhancing behaviours according to individuals' capacities and skills (effectivities).Key Points:
1.Exercise uptake and adherence is influenced by thoughtful design of environments.
2.A multidisciplinary approach to physical activity is best able to initiate the required design features.
3.Designers for physical activity must understand the relationship between functional aspects of the environment and individual characteristics.