Crawling is a swimming posture with reasonable structure, small resistance, uniform speed, fast speed, the least effort and the fastest speed, so it is often used in competitions.
2. Breaststroke: It is a swimming posture that imitates frog swimming. The human body is prone on the surface of the water, with its arms bending and paddling under the symmetrical straight arms on its chest, and its legs bending and stretching symmetrically to catch water, just like a frog swimming. In breaststroke, swimmers can easily observe whether there are obstacles ahead and avoid hitting them. Breaststroke is labor-saving, durable and of great practical value.
3. Butterfly stroke: Butterfly stroke technology evolved from breaststroke technology. In butterfly swimming, the body is prone in the water, and the body is pushed forward by the powerful stroke of the arm and the wave stroke of the leg.
4, backstroke: also known as backstroke, is a swimming posture in which the human body lies on its back in the water. During swimming, the head comes out of the water and it is convenient to breathe; Lying on the water is more labor-saving.