So I'm having a ton of trouble rolling and breathing - especially when I'm on the bottom and top has a shoulder in my solarplexus. Basically, tapping so I can breathe/not puke. I know things will get better as I get in better shape and get less nervous, but I'm also wondering if grappling-specific conditioning would be a good idea. My thought was to lie down and set a relatively heavy DB on my solar plexus after a cardio session. I was just thinking that might get me used to the sensation/situation. Anyone else have magic workout/exercise out there?