Triathlon became an Olympic sport at the 2000 Games. The first triathlon race was held in San Diego, California, U.S.
Triathlon combines three separate sports: swimming, cycling, and running. Triathletes can swim any stroke, but always choose the front crawl, like in freestyle swimming, because it is the fastest stroke. During Olympic competition, competitors swim 1.5 km, cycle 40 km, and run 10 km. Since the three events are held continuously, changeovers from one discipline to the next are crucial to winning. The winner is determined by the person who finishes the course first.