<s>[INST] If I do some walking for about an hour often my legs go weak and I can hardly walk. I am in pain. I have spinal stenosis in my lower back. Surgery is being placed for fall. Could this just be a symptoms of what I already know I have? Am just worried about ms or something like YYYY@YYYY [/INST] Yes it is the symptom of spinal stenosis and when nerve is compressed, numbness and weakness are felt along the supply of nerve. </s>