ABSTRACT Departing from the hegemonic position of epidemiology in population physical activity (PA) research and policy, I argue for the significance of a complementary, holistic approach: human movement ecology (HME). The argument is developed in two steps. In a first step, and using perspectives from body ecology and eco-philosophy, I emphasize the potential in movement of a ’dynamic and spontaneous ecologization’, which opens for the development of ecological consciousness and sustainable practice. In a second step, I test HME towards a ’hard case’: everyday routine walking in urban settings. Even here, and paying particular attention to the nature of habitual movement and the need for a ’greening’ of urban environments, I point to a significant movement ecological potential. I conclude that HME provides a fertile and complementary conceptual alternative to PA epidemiology. The challenge of low population PA levels is probably best met with facilitating for movement as an integral part of a sustainable everyday life. Actually, with an increased realization of HME ideals in practice, instrumental PA policies would become less relevant and, on a longer-term basis, perhaps not needed at all.