I got this bra to use while still nursing after much research to find "the most supportive sports bra in my size", which is 30F.  It's more supportive than my nursing bras, but I would want to wear my nursing tank top (Bravado nursing tank)over it if I was to go jogging.  Alone while jogging would have too much bounce.  It would be better for low-impact activities.  Also, the design cuts low around the outer top portions of my breasts near my arm pits so maybe that accounts for the lack of total support.  Last, the fabric is pretty thin like a regular bra might be, not that soft plush thicker fabric many sports bras are made of.  I'm debating on returning it but right now can't find anything better. If anyone knows of a mega supporting (non-underwire) sports bra in 30F, please let me know!