ok, so I don't remember hearing about this when I was pregnant with DS, but now I've seen a couple of people trying it? Enlighten me!

Do you just really sit on the ball and bounce up and down? What exactly is that supposed to do? Sorry, but this is a new one for me. TIA!!!
Re: Boucing on an exercise ball?
Bouncing is the fun part! Especially for those of us who aren't getting any bedroom action...
Seriously, though: AWESOME for hip and sciatic nerve pain!