Yes there are officers on this board who have returned to work. Some aren't currently active because they're back to their lives.
Heads up: your idea of a hip replacement is clouding your understanding of the new generation of hip replacements. You should easily be able to return to full work. Now, recovery takes time, so I don't mean a month later you're ready to run full out and chase someone, but yes you can get back to your job. Full recovery typically takes a year, but you should be able to return to full work long before that.
Your surgeon is part of a growing number who are confident that the devices can withstand aggressive activity. My surgeon placed no restrictions on me. I just finished a week vacationing hiking and walking up hills and mountain paths and jogging. Just an occasional slight soreness. I also lift weights.
I imagine I might run more in a week than a typical officer has to run in a week. Not meant as an insult or anything--I'm only imagining here. I can stand and walk as much as I'd like and bike as well.
I literally do not think about my hip when I engage in sports or walking ... except to think, "dang, my new hip is so good! Aren't I fortunate!"
Again, the full recovery takes a year. So check your short-term disability coverage and take every bit of that that you can. You won't need a full year off ... The recommended scenario here is 12 weeks/3 months off.