I joined Mark Peterson and his Swimfast class after disappointing swims in all of my triathlons, including 4 IM's. Despite putting my time and energy into my swimming, I was not improving. After 1 year of Mark's swim class, I took over 10 minutes off of my Ironman swim, got out of the water fresh, and in sight of the competition. More importantly, this past season, instead of dreading the swim leg at races and looking at it as something to get through until the real race started, I had fun in the water. Mark has an excellent ability to recognize what individual athletes need, both in terms of technique as well as emotionally. He knows when to push and when to back off in workouts. The workouts are an excellent combination of technique work, hard efforts, and goofy fun.An unexpected benefit to joining Mark's class has been the friendships and training partnerships that the class has fostered. Whether swimming, biking, running, or hanging out over dinner, the community created by Mark's class has been a huge positive influence in my life. I'm definitely sticking with Swimfast!