I'm 38ddd - the 38DD works out beautifully - it actually looks so good on- aside from being incredibly supportive - that I've taken to wearing this every day I can. What days can I not, you ask? Days I want/need to wear white shirts :-/ I would love if there was a nude color option! In terms of s...ports - I play tennis in this NO problem - it stays put and holds everything in place - I feel completely secure and also extremely comfortable - no digging or anything. It's so comfortable that I even sleep in them. They do tend to roll up, especially on my right side - but... I've rolls, what can I do? I don't blame the bra. Literally, unless I need to wear a white shirt, I just put one of these on until I sweat in it, at which point I shower and put on a new one until the next sweat session (and yes, I work out every day ;-) I own six of these - can't wait to get 3 more in a nude color... hint hint, ON! get on it!