Underwater Dolphin Kick Drill for Butterfly Leave a Comment / 蝶式 / By hkswim This drill works on narrowing your dolphin kick to allo … Underwater Dolphin Kick Drill for Butterfly Read More »
Butterfly Ball Release Drill Leave a Comment / 蝶式 / By hkswim This drill helps with learning the proper finish and re … Butterfly Ball Release Drill Read More »
