I agree with Briz from the last post. Haven't seen a lot of issues with trochanteric bursitis after THR (admittedly have seen few Birmingham hips). Have seen more issues with trochanteric bursitis when the abductors are weak rather than the type of exercises that are done to strengthen them. Another note re. strenthening, I usually try to get them doing exercises in weight bearing asap as more functional than sidelying / crook lying. (examples: 1/4 squat with attention to maintaining alignment (i.e. no adduction at knees) and even with theraband around the knees so that they maintain some increased tone in the abductors; once the are able, small step ups and downs (increasing height as able) again ensuring they maintain the alignment from hip to knee to foot)...)