skate double which category should they go into?

After watching Finding Her Edge, I was wondering which category should skale doubles be listed in.

There have been some people listed as stunt double and other as skate doubles, so there is difference.

I read a post that said hand doubles should be Additional Crew as they are stand-ins but skate doubles are more like stunt people standing in to undertake more risky or technical stuff.

At the moment the series skate doubles are listed with the actors but I think it might be better to move them into the Stunts section.

What is IMDB's preference?