In the freestyle relay, each swimmer swims one fourth of the race distance using any stroke desired. Of course, as in the individual events, the Australian Crawl is the stroke most often used. The medley relay employs all four strokes, one stroke swum by each of the four swimmers on the relay team. The order of strokes, however, is different than that used in the IM. The backstroke leg is done first in the relay because the backstroker has to start in the water. Clearly this would present a problem if the backstroker had to be concerned about someone coming into the wall while the backstroker was preparing to take off. Therefore, the order of strokes in the medley relay is backstroke, breaststroke, butterfly, freestyle.