The four Olympic swimming strokes are butterfly, backstroke, breaststroke and freestyle. Of these four strokes, the slowest is the breaststroke. This stroke is unique as it is the only one that involves simultaneous movements of the arms and legs, with the arms pushing outward from the chest, and the legs making a frog-like kicking motion. The breaststroke is also the earliest of the four strokes to be used in swimming competitions, which may explain why it is the slowest. The butterfly is the fastest stroke, followed by the freestyle, backstroke and finally the breaststroke.