I want a reduction, so give me the truth

I currently a 38G cup and have over a D cup since I was 12. I am now ready to get a reduction of living more than 2 decades with Tina and Sarah ( yes they have names). I want to know the truth about reduction recovery. And what is a good size to go with for an active lifestyle. I wear two Sports bras while running and there is still a lot of movement.

I'm ready to say good bye to back pain.