Want to get fit but not lose boob size?

Lina

Hey Everybody! Hope you're all having a great day. I just wanted to see if anyone had any tips on how to tone oneself/get a little fitter without going down a cup size. I'm not overweight or anything, but I do want to get a little fitter just for health. However I have just put on a little bit of healthy weight so I finally have c cups (Yay!) but I don't want to lose them again. Any advice out there or is this a lost battle? xx