One of my kids swam. Funny story. He is coasting thru a 100 meter race in the outside lane (coasting is why he was always in the outside lane) when the coach gets right along the edge of the pool and starts to scream at him to go faster. Coach was really loud. Sure enough, his last 50 was way, way, way faster than his first 50. He comes out of the pool and I am timing the lane next to his lane and he gets out all upset because the coach screamed at him. I told him he had set a new PR for the 100 meters so what is he complaining about.