Hi Cheryl
I had LD recon last October (without implant). Operation went very well and it was the right one for me.
I'm same age as you, and like you very active working out 4-5 times per week.
i still do this, go to exercise classes about 3 times, walk and cycle (cycling not been affected by lack of back muscle). Have done a bit of swimming but not enough to say if there is a difference pre or post op - lack of swimming down to body consciousness not that I don't feel capable.
I used to do resistance training but gave that up after mx as I was so scared of getting lymphodema with using weights.
The only think I assume I couldn't do but not tried is swinging on monkey bars!!
Post opl I've had a fat filler procedure and awaiting another one as the muscle itself isn't enough to 'fill the area'.
Good Luck with your decision ;
Jude.