The standpoint of this paper is the distinguished Ode to Sport from Pierre de Coubertin, specifically the second part of the elegy, the one concerning beauty. Starting with ?O Sport, you are Beauty!?, Pierre de Coubertin mentions, beyond beauty, an assemblage of aesthetic categories such as sublime, abject, balance, proportion, harmony, rhythm and grace. He also mentions strength, power and suppleness. Although the first quoted categories are general categories of aesthetics, it seems quite relevant to emphasize the need of the (...) author to introduce specific categories that fits to body movement and sport, such as strength, power and suppleness. There is no doubt that the first group of categories also fits to sport and body movement, but it equally fits to different forms of art, while strength, power and suppleness can only be literally applied to sport and performing arts. The purpose of this paper is to analyze strength as an aesthetic category of sport, developing three main arguments: the feeling of achievement and its conservation, the fight against gravity and the multiple forms of strength?s expression. It is concluded that strength can improve the communicative power of sport and its emotional appeal. In sports such as gymnastics, diving or synchronized swimming, the appreciation of strength exhibited by the athletes communicates to the observer some king of ease and lightness that enhances the aesthetic judgment. In other sports like weightlifting, sumo or rugby, effort and heaviness are stamped on the athlete's faces, what contributes to a sort of communion between the observer and the athlete that can also improve the aesthetic experience. (shrink)