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As in breaststroke, the Corsuit helps prevent hyperextension of the back in
butterfly, promoting a streamlined stroke. Even more so in butterfly, the head
should be kept low while breathing, which is encouraged by the tactile feedback
provided by the Corsuit.
Furthermore, during the butterfly down-kick, the swimmer should move into a
Flat Spine position, allowing the hips to generate maximal power. To do so, the
swimmer should feel the back flatten completely against the Corsuit as the legs
drive down.
As highlighted previously, this Flat Back position in the down-kick will alternate
with a Neutral Spine position during the up-kick.
BUTTER
FLY
DOWN-KICK
FLAT SPINE
NEUTRAL SPINE
UP-KICK
