The swimming pattern in which both arms are extended and pulledback together in a circular motion while both legs are thrust out and pulled back…

Breaststroke is a swimming stroke where both arms move together in a circular sweeping motion. The swimmer pushes both arms forward, pulls them back in a wide circle, then brings them back to the chest.

At the same time, both legs kick together like a frog. The legs bend at the knees, thrust outward, then snap back together to push the swimmer forward.

This description perfectly matches breaststroke movements. The synchronized arm circles and frog kick make it different from other strokes where arms and legs move alternately.