i know this might be a weird/dumb question but im really curious. is it good to foam roll or use a baseball on your abs? and further, are there any muscles you shouldnt foam roll and why?
Whenever I've tried it I never really felt that foam rolling my abs did much, I use to baseball hit a few trigger points here and there but nothing too major. Just keep in mind that in that area you have a more vulnerable access to your organs, and putting a lot of pressure on them just isn't a good idea.
Dude if you can foam roll your abs you're a bigger man than I am. It hurts bad enough just foam rolling my IT band.