Swimmers close to pool edge without speed reducing, two hands press pool edge at the same time just like push
body, when two hands touch pool edge, one hand quickly off and pull backwards, the other bends elbow so as to
bear partial weight, moves away from finger tips and turns one side, tilts and bends knees, as slightly catch, two legs
close to pool edge, legs cross from the bottom of upper body, hands push away from pool edge, hands bend highly
and surface and move arms, hands and head take the water at the same time, head quickly comes back, palms in
hands push out upwards, when legs are vertical to pool edge, body should try to form one straight line when
touching, two hands put on the hand, fast and powerfully kick away from pool edge