蛙式Breaststroke 50M

1.Perform a recognised start, then butterfly kick in a streamlined position underwater up to a maximum of 15 metres from the start point. 2.Perform recognised turns and finishes 3.Swim a continuous 400 metre individual medley (4 x 100 metres) 1.起跳動作，流線形在水中做到蝶式踢腳最多15米。 2.做出認可的轉池及完成時觸池動作。 3.連續完成400米合規格的個人四式(4x100米)。