Don't gird your waist, it's dangerous. Really learn to dance, the waist becomes thinner, and people are more temperamental. Ballet bending, the effect is super good. And shoulders, temperament will be much better.

Actually, this has nothing to do with learning to dance. It's just that people who learn to dance have a lot of exercise, often exercise their waist muscles and have good flexibility, so they will be thin and don't need to wear a waist.