What kick is primarily used in backstroke?

The flutter kick is primarily used in backstroke because it provides a streamlined movement that maintains the swimmer's position in the water while facilitating propulsion. This kick involves alternating leg movements, with one leg kicking downward while the other leg recovers back to the starting position. Its horizontal positioning in the water allows for efficient and continuous energy output, essential for maintaining speed and stability during the backstroke.

In contrast, the dolphin kick is typically associated with the butterfly stroke, where both legs move simultaneously in a fluid motion. The breaststroke kick, which involves a simultaneous circular motion of the legs, is specific to the breaststroke and does not lend itself to the streamlined position required in backstroke. Lastly, the scissor kick is primarily used in certain strokes like the side stroke and is not applicable in backstroke mechanics. Understanding the distinct kicking techniques helps swimmers execute strokes effectively while maximizing speed and efficiency in the water.