Our expert says:
Short of continuing with physio, I must confess I don't know. It sounds like a neural thing to me, though I've never heard of sudden buckling of the leg. That really is very peculiar. Has the physio not said anything about it? Perhaps you need to explain to them exactly what is happening and then see if they can help with the rehab, and some work to help you control the leg better. I honestly have not heard of this before, particular relating to a hip injury caused by an abdominal strain. there seems to be some structural issue that is affecting the nerve or the stability and your brain is protecting against having weight on it. Really, only the physio can assess and help out, so maybe bring it up there.
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