Ryan Woodruff, Lynchburg YMCA Swim Team
We did this set in a 25m pool. After the prescribed underwater distance, swim smooth free, fly, or back for the remainder of the lap. This interval gave most of our squad :05-:10 rest per 25.

Free Swimming Workouts, Sets, Ideas, and Dryland Exercises from Professional Coaches Around the World
Ryan Woodruff, Lynchburg YMCA Swim Team
We did this set in a 25m pool. After the prescribed underwater distance, swim smooth free, fly, or back for the remainder of the lap. This interval gave most of our squad :05-:10 rest per 25.
