Reminds me of the Kubrick scene in the airlock.
Could also be easily done, like this:
True, it's does look like the running ramp in 2001. But they weren't doing acrobatics like this in the movie. As well, the vomit comet max's out at around 30 seconds tops of near weightlessness. There are skylab videos that are uncut of people and things floating around, acrobatics and such, that are longer than a minute. So no, not the vomit comet trick.
CGI is out. So the only other option other than it being real would be some sort of sophisticated practical effect(s), like cables and gimbals, etc. But I see no evidence of that kind of rigging. As well as in some of the shots, I don't see how it could be done with practical effects at all. Here's a cool fly-thru from the early 70's:
There's an archive I found a couple of years back of all the skylab footage - I'll try and find it again.