My mother had three hip surgeries. (The doctor used the wrong kind of prosthesis on the second, and it didn't work.) It was marvelous, the difference they made in her life. She was more active, much easier to get along with. She was even step dancing! Not well, but she was step dancing.
I offer the following exchange between mom and her doctor.

Doctor) Now I want you to do your exercises as steadily as you practice your religion.
Mom) I'm not very religious, so I'll do them more often.

The exercises do make a difference.

My piece of advice is to have all orthopedic surgery in winter. Now is when you don't want to go anywhere. (Unless you're in Australia, where it's summer.) Now the skies are gray, the sidewalks are icy, and the wind is chilly. You won't mind staying in all day, doing whatever you do when you stay in all day. (Mom liked crossword puzzles, and books, oh! and The Edge of Night.)
Summer the sun is in the sky. The air is warm. You want to go places and do things. Which you can't because one of your legs isn't working properly. Mother had her second hip replacement in July, and I came entirely too close to matricide. It didn't do her disposition one bit of good.