Strength is a central element of sport and therefore an equally central topic in sports science. In sports science, strength is dealt with primarily in biomechanics. Biomechanics reduces strength – legitimately – to a scientific subject. As a result, it loses sight of strength as a lifeworld phenomenon. The discipline that allows us to grasp strength as an everyday experience is phenomenology. This essay undertakes a phenomenological analysis of strength to uncover the diversity of strength phenomena in the lifeworld of (...) sport. The theoretical and methodological basis for this is Hermann Schmitz’s ‘new phenomenology’ (Neue Phänomenologie). With the help of new phenomenology, I first develop a real definition of strength (‘strength is an intrusive effect through one-sided incorporation’). Second, I work out the general structures of the phenomenon of ‘strength’, that is, a system comprising ten categories (‘pulling, pushing, centripetal, centrifugal, lifting, lowering, strong, weak, heavy, light’). Third, I use this system of categories for a phenomenology of sport-immanent strength phenomena. The paper thus makes a contribution to a pure phenomenology of sport. (shrink)