it doesn't matter if someone is fit or fat, how much pain is experienced after an operation like this one is mostly just luck. I looked into it, and plenty of women who have hysterectomies report having very little pain, or no pain after the first day or two. It seems similar to other pelvic operations I am familiar with like c-section, most women are surprised at how much it hurts, but there is a significant minority that have very little pain for a few days. Fatigue is the only thing that I can think of that is truly universal about post operative recovery.