Michael Phelps used to hold long course world records in a breaststroke and a backstroke length.
Medley is a combination of four different swimming styles -- butterfly stroke , backstroke , breaststroke , and freestyle -- into one race . Michael Phelps . Phelps is the long course world record holder in the 100 meter butterfly , 200 meter butterfly , and 400 meter individual medley as well as the former long course world record holder in the 200 meter freestyle and 200 meter individual medley .