I can't jog...my breast are too big? Any good sports bra's, that actually work?

[Gillian]

I'm trying to move past walking and start jogging as part of my exercise...I've even bought 2 sports bras...first one was fruit of the loom..didn't help so I moved up to a little more expensive brand...it's not helping either...any good bras that will hold me down...I'm a D cup