eits
Lifer
Interesting...
If that's the case, I'm surprised no one can come up with a method to do it upright since upside down is not fun when the blood starts rushing to your head. You don't have to be hanging from your arms(though that would be free) but you could easily just hang from your underarms with a harness or something... as long as your lower torso isn't being held up, it should still provide relief so long as it's hanging. :\
it's harder. there's no comfortable way to do it without harnesses, like a vest you hang in while your legs dangle. there's a machine that actually kinds does that, except you're on a treadmill... it's called a newton. it helps rehabilitate lower extremity injuries without much weight bearing.