Front crawl

A swimming stroke in which the arms alternate overhead while the legs kick continuously. Its alternating arm action and flutter kick make it the fastest and most commonly used stroke in freestyle swimming.

Flutter kick: An alternating up-and-down leg action used to propel and stabilize a swimmer. Its continuous rhythm supports the stroke’s balance and forward motion.
Freestyle swimming technique: The techniques used to swim freestyle efficiently, most commonly based on front crawl. Front crawl is the defining technique behind ordinary freestyle swimming.
Open-water swimming: Swimming in natural bodies of water such as lakes, rivers, and oceans. Front crawl is widely used, with sighting added to stay on course.
Backstroke: A competitive swimming stroke performed on the back with alternating arm actions and a flutter kick. It shares the alternating rhythm but places the swimmer face-up.
Freestyle swimming: A competitive swimming event in which swimmers may use any stroke, though front crawl is standard. Front crawl is the stroke almost always chosen for freestyle races.
Arm recovery: The phase in which a swimmer’s arm leaves the water and returns forward for the next stroke. The overhead recovery is the visible half of each alternating arm cycle.
Triathlon: An endurance multisport race combining swimming, cycling, and running in sequence. Front crawl is the standard fast stroke for the swim leg.
Butterfly stroke: A swimming stroke with simultaneous overwater arm recovery and a dolphin kick. Its synchronized arms and dolphin kick contrast with crawl’s alternating arms and flutter kick.
Body roll: The rotation of a swimmer’s body around its long axis during a stroke. Rolling helps each arm recover and reach forward while reducing shoulder strain.
Swimming breathing techniques: Methods for coordinating breathing with movement while swimming. Crawl breathing must fit between strokes without disrupting body position.

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