If the body is in the water, if you want to make your body move forward quickly, you must minimize the resistance of the water, just as reducing the air resistance can make people run faster in the process of running.
Breaststroke is a posture in which the body swims forward facing the water, so the stress area is relatively large and the resistance will be greater. If you want to swim fast, you must reduce the contact area of your body with water, thus reducing the resistance of water to your body.
Second, if the breaststroke technique is imperfect, immature or wrong, it will lead to the swimmer's speed reduction and adjust the stress area between the body and the water. At that time, in the process of paddling with both hands, it was necessary to be consistent with the kicking action.
When a person's upper body comes out of the water, it will float briefly. During this short pause, many people did not make coherent progress, which affected the speed of breaststroke.