Use the “Single Arm Drill” to Perfect Butterfly Timing! - Swimming 2016 #6
10:14
Learn to Swim - Butterfly Part 2
4:20
Use a One Arm Drill to Speed Up Your Butterfly! - Swimming 2015 #43
3:14
David Marsh's Next Wave Technique: Butterfly
19:23
Teaching Butterfly to Young Swimmers
7:38
5 Great Butterfly Drills for Hip Drive
7:08
Swimming - Freestyle - Increase Effective Propulsion With the Single Arm Butterfly!
3:23
David Marsh's Next Wave Technique: Starts
4:12