My test of a sports bra is jumping jacks, this one fared a 7 out of 10. After about 20 minutes of wearing it, it seemed to loosen up, which isn't what I want. I am still working on adjusting it, which is one nice thing about the bra, a lot of adjustment options.  The upper back clip left marks on my back that I am pretty sure are from doing ab work. At this time, I don't think I would but another one.