The breaststroke kick is a swimming technique used primarily in the breaststroke style. It involves a unique movement where the legs bend at the knees and then extend outward in a circular motion. This kick helps propel the swimmer forward while maintaining a streamlined position in the water. To perform the breaststroke kick, swimmers start with their legs together and knees bent. They then push their feet outward and around, bringing them back together to complete the cycle. This kick is essential for effective propulsion and is often practiced to improve overall swimming efficiency in the breaststroke.