Sport IT is an emerging global movement. Many research efforts have addressed the potential of IT for promoting physical activity, a countermeasure against the factors that cause welfare problems such as diabetes, high blood pressure, and heart disease. This paper presents an overview of research related to IT and physical activity and identifies three reoccurring themes; 1) Measurement and latforms, 2) Support for opportunistic individual training and finally, 3) Encouragement through Toys and Games. These themes or chategories of Sports IT, are furher explored in a detailed and systematic way. This is wrapped up in a discussion of what could be seen as impotant further research addressing the issues found in this body of research.