Thanks for your input guys.

I'm really not sure there's any problem at all with the exercises we've been doing. Everybody in the world as far as I can see has abd in standing and in lying as routine post-op exercises. It's just that this guy who seems to have the ear of the doctors and authorities in this establishment is insisting that it is his experience!

I do see up to 40-50 patients a day here, and we encounter lateral hip pain fairly regularly ..... I think I'm going to keep my own data on this, and then maybe I can come up with a counter-argument.