蝶泳, or butterfly stroke, is a swimming style characterized by a unique arm movement and a simultaneous kick. Swimmers perform a windmill-like motion with their arms, pulling through the water while their legs execute a powerful dolphin kick. This stroke is known for its rhythm and requires strong coordination. To master butterfly stroke, swimmers must develop both strength and technique. The key elements include a strong core, proper breathing, and timing between arm and leg movements. It is often considered one of the most challenging strokes due to its demanding physical requirements and the need for precise timing.