I'm currently an H cup. I've also had a horrible time w/mastitis & repeatedly plugged ducts. I'm almost afraid to try working-out because I don't want to pinch a duct from either bouncing too hard or from wearing a confining or ill-fitting sports bra.
I wear the Bravado double-plus nursing bras, which are o.k. around the house, but really don't offer much support.
WDYD?
Re: Big-boobed BFers: How do you exercise?
Baby Boy #1 born 1/15/2010
Babies #2 & #3 arriving Spring 2014 (EDD June 18)
You need a good sports bra. You shouldn't need to wear 3-4 bras/tanks/whatever to get support. They are expensive, but they do the trick. Moving Comfort has some, Enell as a pp mentioned, and some others...try Title Sports as well. They have a sports bra called Last Resort, but I am not sure what size it goes up to.
Also - pump before and after exercise...I found this one out the HARD (literally!) way. I got super engorged several days once I started back to working out.