Carefully? It's not so difficult. I could run too, it's not so restricting with the slit.

[Okay maybe she wouldn't be as fast as others, but even so. Elsa is capable of it even in the dress and heels. She picks the dress up a bit, lifting the skirt up a little to show what she means.]

I guess I'm just used to dresses back home a lot so they're not so bad.