If you haven't read about why I got surgery and would like to know more before you hear about recovery check here: http://www.thedallasraeway.com/#!Accepting-the-things-you-cant-change-and-changing-the-things-you-can/c1of7/555fffb50cf24874175198e9
First off I want to state that everyone's recovery will be very different. It is very important you and your doctor come up with the right plan for you. This is merely my experience with recovery from a lift and an augmentation. Considering I got a lift as well as an augmentation my recovery will be a bit different than most.
As you may know I went with a smaller sized silicone implant, under the muscle. When you go under the muscle one of your must things to do is 'massage' afterwards. Just know that it is not a gentle massage. You have to force the implant up as far in the pocket as well as down. This insures the pocket stays bigger than the implant so they stay soft. You absolutely cannot skip this or try to be too soft. It is very common people have to have surgeries to fix tightened pockets. So keep that in mind.
As far as the stretching feeling goes - this will depend on how big you go and how well your muscles and skin stretch. My chest was so tight for the first few weeks it was hard to have full motion of my arms. It got better pretty quickly with little stretches regularly against a wall, 4-5 weeks. For me also the poor posture with the tight chest gave me serious back pain. It could have also been from having to sleep on my back. I highly suggest a foam roller, it helped a lot.
Scaring - since I had a lift. Generally scars on implants are no big deal and they disappear. I however got a lollipop lift - Google it. With this procedure you run a lot higher risk for complications, like: losing complete or partial feeling anywhere on the breast, stitch abscesses, and in some rare cases complete nipple death. I am 6 months post surgery and still have slight numbness on small spot on the left side. It can take up to a year for full sensation to come back. I did have complications with my stitches, which I would have know could possibly happened because it freaked me out frankly. My body decided to reject the internal stitches that were supposed to dissolve so instead of healing my body tried to spit them out essentially - remember I have a lot of stitching from the lift. This was a painful and uncomfortable few weeks as they didn't stop until they all were out or dissolved. Although there are no long-term problems from this it did make a section of my scarring quite bad. Big bummer but there is nothing I can do.
Lastly getting used to the feel in general and at the gym. They are going to feel like strange foreign objects for a little while but you adjust fast. For me I had to sleep on my back for a while because it felt uncomfortable to sleep on my side unless I wedged a pillow between them. This is because the stretching of the pocket like that is a bit uncomfortable/painful. It eventually wore off and I got used to it after 4-5 weeks. Sleeping or lying on my stomach still feels weird; I have to have a pillow under me if I do that.
At the gym you're going to feel all sorts of new things as you start getting back into lifting. My doctor told me 3 weeks before going back to the gym. 6 weeks before any pec engaging exercises though. Cardio was a go after 3 weeks as well. Running was very uncomfortable for a while. First because of the healing pockets being bothered by the movement then because of the odd sensation of the implant sliding up and down again this took me about 4-5 weeks to get used to. Another odd feeling was pull-ups, it felt as if I was going to pop them. I had to get used to the sensation with assisted dips for a while. I didn't lose much strength at all and was able to get back to normal pull-ups and being used to the feeling in 2 months.
At six months post op I'd say mine feel about 90% as far as being healed and adjusted to my body. For some 100% may take up to a year.
I am incredibly happy with my decision. I highly suggest that before making it you get answers to every question you possibly have as well as meet with multiple doctors to find the absolute best fit. Do not settle. It's a life long commitment make sure you're getting exactly what you want, especially if you're getting a lift.
My surgeon was Doctor Kimball Crofts out of Aesthetica Medical Spa in Linden Utah. I couldn't have picked a better team. If you are interested here is their info: http://www.aesthetica.com