B.**+Swimming+Strokes

=Competitive Strokes =

Breast Stroke:
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 * The body is in a prone position.
 * Involves frog kicking alternates with a simultaneous movement of the arms from a point in front of the head to shoulder level.
 * When swimming competitively, the swimmer's head must be kept above the surface of the water at all times.

Butterfly Stroke:
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 * The most difficult and exhausting stroke.
 * The body is in a prone position.
 * Involves the dolphin kick with a windmill-like movement of both arms in unison.
 * When swimming competitively, the swimmer must not swim underwater. The only time a swimmer can swim underwater is the first stroke after the start and each turn.

Back Stroke:
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 * Involves alternate over-the-head arm strokes and a flutter kick in a supine position.
 * When swimming competitively, only 15 meters can be spent underwater from the start or from each turn.

Freestyle :
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 *  Swimming where any stroke is used.
 * When swimming competitively, only 15 meters can be spent underwater from the start or from each turn.