run. also test the cups, give them a good stretch too. you want a little give, but not too much. the most sort of stable it is, the more it's going to hold you in. finally, you put the bra on, make sure there is no spill over, if so you will need a bigger cup size. last part is the band, now 70% of the support of the sports bra comes from the band, so it's really important to get your size. when you put on the sports bra, put it on the farthest hook and if you can slide a finger underneath it and pull it away from 