Underwater fitness is a new type of aerobic exercise, which is carried out in the water of 1.3- 1.6 meters, and practiced by land aerobics, ballet and other training methods. It combines the different rhythms of body movements and dance steps, making the body more energetic, shaping a beautiful posture and achieving good fitness results. Dancing aerobics with music in cold water is not only cool and comfortable, but also reduces the wear and tear of joints caused by exercise. The figure-showing swimsuit shows the curve of the exerciser.