How to Do a Single Arm Drill Leave a Comment / 蝶式 / By hkswim The single arm drill can improve the backstroke and but … How to Do a Single Arm Drill Read More »
Freestyle Single Arm Drill (Unleashed) Leave a Comment / 自由泳 / By hkswim This clip is an early sneak preview of our upcoming DVD … Freestyle Single Arm Drill (Unleashed) Read More »
