@cynthia, well, for the antero-lateral approach that I had, the surgeon had to "dissect" that muscle/tendon, and other things, in order to get at the joint to do the replacement. Of course, they stitch them up again. It is unknown at this point whether they just never healed after the stitching, or if my activity kept repeatedly dislodging tissues that were trying to heal, or if it healed and then tore. I have never been able to walk since the surgery without the limp that is characteristic of a severe gluteus medius tear. I DO know that when I have my gluteus medius repair surgery, I will be either non-weight bearing or just toe-touch with the surgical leg for 6 - 8 weeks to allow for healing. That certainly was not the case with my THR, which included healing from the GM dissection, which I wasn't fully aware of. I was full weight-bearing then.
I did do in-home PT, and it is possible that some of those activities hurt me, although most were very gentle, except for the one where you lie on your back and hook a towel around the bottom of your foot and stretch your leg up straight and hold it for awhile. That could have done damage. My regular non-PT activities were VERY mild, just walking around a bit. I had more intensive PT starting at 7 weeks, continuing for 22 sessions, since I still had the limp and my insurance paid for every penny of the cost. It is also possible that that hurt me, too, although I definitely had the limp going into it, so probably the damage was already done. I've done research about the antero-lateral and lateral approaches, and apparently having a permanent limp afterwards is more common than with other approaches, which makes sense, since the GM is cut. If it the cut is big enough and doesn't heal, or if it gets torn more and doesn't heal, then you have a limp, and there is no way around it. It's just a fact of anatomy. It doesn't have to be permanent, if you can get the surgery to repair it, but gluteus medius and gluteus minimus surgery is fairly new, and many orthopedists don't know about it, and many orthopedic surgeons can't perform it.