How to do a single arm drill when swimming

The single arm drill can improve the backstroke and butterfly stroke. Get expert tips and advice in this swimming video tutorial. Take Action: Focus on backstroke & butterfly. Breathe every other stroke. Helps strengthen 1 arm. Phillip Toriello has 16 years of competitive swimming experience. 12 of those years he has been teaching and organizing swim events for swimmers of all levels and ages. He is has competed in all four strokes, and their corresponding events. Though his favorite race, is the individual medley. Phillip is the Aquatic Director at the high end Avila Bay Athletic Club.