I may have gotten spoiled by my bras before, but this one really just doesn't cut it for truly high impact aerobic exercise(jumping jacks, jump rope, sprinting, etc.) In addition to the odd fit (other reviewers are right that it's hard to get on and off), the main issue I had was that the fabric covering the chest area has a weird mesh that doesn't provide any support. So, the underwire and straps have to do all of the work, meaning it's tight and uncomfortable, but not actually supportive. Maybe this will work for someone with less than a D cup (I'm a 34 D, and fit wise it was perfect). I was hoping for a good replacement for my old Freya Firm Control Underwire Sports Bra, but this just still had too much bounce for me.