The Alpha Centauri Olympics was an event held on Alpha Centauri. According to River Song, it was more difficult for a humanoid to participate, as Alpha Centaurans had "all those arms and legs".
The Fifth Doctor once claimed that he felt so rejuvenated upon drinking Aqua Galatia that he could run a marathon, wrestle a Myrka and then compete in every event of the Alpha Centauri Olympics. (AUDIO: A Requiem for the Doctor)