Induvidual Medley (IM)
Individual medley consists of a single swimmer swimming equal distances of four different strokes within one race. Individual medley consists of four strokes. These four strokes go in an order by Butterfly, Backstroke, Breaststroke and finally Freestyle. The swimmer will swim one quarter of the race in each style, in this order.
For IM relays the order is switched up. Instead the order is back, breast, fly, free. It's like this because backstroke has to start in the water therefore it has to be the first stroke.
IM is one of the hardest events because it has every stroke. The race lengths are 100, 200, and 400. The 400 IM is honestly terrible. I do not recommend. I do not understand how people swim that race all the time, it hurts a lot....