Submuscular vs subglandular

I've been doing a lot of research around my tummy tuck so I decided to give that a break and start researching breast augmentation.  We have already discussed with my doctor and chosen silicone implants, but after my research I definitely have a big question....submuscular vs subglandular?  Meaning, place the implant under the pectoral muscle or under the breast tissue (above the muscle).  For me, my breasts sag some but not too bad, I'd really just like to add a little of the fullness I've lost from breastfeeding three babies.  I really find that the idea of putting the implant UNDER the muscle kinda freaks me out.  I know that this is the more "popular" style for implants currently but how can they look right?  How can you exercise normally afterward?  I mean really, wouldn't you feel the muscle squishing the implant while doing chest work like push-ups??  I'm a pretty active person and have no intention of not working out just because I got implants!  I want to continues jogging, karate, insanity, asylum, etc... I know the chances of sagging are a little higher with subglandular and there is more risk of capsular contracture (hardening and tightening around the implant) and some say it is harder to get a good mammogram picture done.  I'm not too worried about the mammogram thing, there is no history of breast cancer in my family and I believe a good tech will be able to do her job if she's told about the implants before the squishing begins.  Really, from pictures I even like the look of the subglandular more, to me it's more natural looking and that's what I want.  I just need to discuss it with my doctor at my pre-op appointment in a week and a half...I hope he does subglandular, otherwise I may just re-think having my breasts done, after all they're not THAT bad!

After discussing this with my husband and spending some time looking at before and after photos with him I've discovered something.  It's not the placement of the implant that makes a difference to me but the SIZE.  Both dh and I like when the breasts are filled out but not overly round and definitely not porn star boobs!  I feel better now and I'm looking forward to my pre-op appointment more and trying on the new me!