Our first US guest is a current world record holder and backstroke champion. Peter Marshall reveals how he broke three world records in backstroke. Like a lot of age group swimmers, Peter started out doing lots of miles in the pool. He was a distance swimmer in his early years but converted to a sprinter after making some changes to his training. In the podcast he chats about what changed in his program and how his gym workouts shifted focus. We cover race routines, psychology and developing power in the water.