Push the water in a figure of eight, but don't put your hand out of the water. Waist and legs are separated, one hand is akimbo, the other finger is close together, vertically placed on the inner thigh, palm to leg, one hand is extended sideways, the back of hand is paddling upward, and the waist is bent.
Stand in the water with your hind legs apart, put your arms in front of you, bend your elbows and paddle backwards, and keep your upper body upright.
Hold the wall with one thigh and stand on one leg. The other leg is raised 90 degrees horizontally in front of the body, and then raised 90 degrees to the side of the body. Bend and straighten the calf several times.
Hold your hips against the wall with both hands, stand on one leg, raise the other leg as high as possible, and bend and straighten your calf several times.