Active streamline describes a tight body position maintained with muscle engagement. Swimmers squeeze their arms close to their ears. Hands stack together while legs press firmly together. Core muscles stay tight to hold alignment.
This position reduces water resistance during glides. Swimmers push off the wall and immediately lock into streamline. Strong engagement prevents the hips from dropping downward. A flat body line allows smoother underwater travel. Small flutter kicks can support forward movement. During a backstroke start, a swimmer glides underwater in active streamline.
That tight position preserves speed from the push off. Coaches emphasize tension to maintain straight alignment. Better streamline technique improves overall race efficiency.
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