I have artificial hips and regardless of the physio or exercise I did, I would experience bad pain in them regularly.  I bought my first pair of MBTs four years ago, and since, I've had literally zero pain in my hips.  Walking with these shoes has done so much to strengthen all the little muscles around my hips as well as in my core.  I've been through a couple of pairs now, and I even have MBT sandals!  Love them.