In out-and-back courses, such as triathlons or time trials, the turnaround is the place where athletes change direction. The turnaround may be a cone, buoy, or designated point.
Turnarounds stress the capacity to slow down and accelerate. In swimming in the open water, a turnaround typically involves swimming about a buoy; in cycling or running it involves a quick U-turn. They are crucial places for good timing as well as for speed and positioning.