This is not actually the same, its just what I do for practice balance.
When my husband and I are riding the 4wheeler together, I pretend that I'm on a horse.

I ride behind him with no foot support and I put my hand in front of me near my waist and close my eyes. I try to fully sit on my butt and not roll my hip too far forward. Then I just try to ride as balanced as possible. He won't let me fall off..I hope!
Its really good when we go up and down hills and turn corners. I seem to really find my core muscles. You don't get the same bump as when a horse trots or canters but you get faster speeds and quicker respond times without over correcting. I seem to have the problem of over correcting my balance then fall off the opposite side.
Don't know if this will help, its just what I do for practice.