First of all, if you get rid of this worry, you won't grow up learning folk dance. Secondly, girls learn folk dance very well, and their body flexibility will be good.

It's just that learning to dance will be hard. Just pay attention to adjusting her diet at ordinary times. Don't worry about the rest, just encourage the child when she can't persist, but don't press too hard, otherwise she will be bored and don't want to learn. At ordinary times, she can show more of what she has learned, which will help her remember and enhance her interest.