Seriously. I can't run without clutching my chest. It's hard to bike because every bump is painful. It's hard to do anything active. Sometimes I think I should wrap myself tightly with an Ace bandage to do anything.
Yes, I mostly own nursing bras, but I tried buying a Champion? I think it was? sports bra, and it doesn't really seem like it helps any more than the rest of my bras. I do have a slew of Victoria's Secret bras that are all probably approaching 10 years old, but none of them have actually fit since before my first pregnancy... (almost 4 years ago now.) It seemed like they were actually substantial and supportive, unlike these things which are all a thin layer of cloth.
I really don't have the money to buy a bunch of expensive bras, though, certainly not for boobs that change in size practically one day to the next. I also have the added complication of struggling with systemic candida yeast, so I do have to wear a new bra every day, but I think if I could invest in two good, reasonably priced bras for active times I should be good.