A triathlon relay is a race where a team of athletes take turns completing different parts of a triathlon. A team of two or three athletes each complete one or two parts of the triathlon, such as swimming, biking, or running.

 

Usually a team of three people take it in turns to complete the triathlon disciplines, with. one team member changing over to the next as they finish their discipline. So, one person does the swim, the next takes on the cycle and the third completes the run.