Concepts like public health, health, and health promotion have been used in relation to sports in different ways in practice, research, and policy. That sport is important and closely associated with public health is quite clear. Many research papers claim that there are obvious connections between the value of physical activity and sport for the health of individuals, as well as for health in society. At the same time, promoting public health is one of the main reasons for large governmental funding for sports in many countries. But how can the relation, or rather the relations, between health promotion and sport be understood? This chapter will theorize the relation between health promotion and sports through five categories: (i) health promotion as an outcome of sports, (ii) health promotion through sports, (iii) health promotion in sports, (iv) health promotion and sports in collaboration, and (v) health-promoting sports. In these categories, the authors discuss and illustrate how research in different ways defines health promotion on one hand and sports on the other and, thus, what research takes for granted in relation to what sports can do. The chapter concludes that understanding the relation between health promotion and sports cannot be achieved by focusing exclusively on only one of the identified relations. Instead of maintaining barriers between different disciplines and relations, researchers and practitioners should work with health promotion and sports as the plaster that stabilizes the whole picture in a changing society. This approach can better utilize the potential of sports in promoting health.