By the way, doctor: What is the cause of my sudden leg weakness?
Q. When I walk for about a mile, my leg muscles suddenly get very weak — so weak I can hardly walk. After 10–15 minutes of rest, the muscles go back to normal and I can continue for another mile or so. I am trying magnesium pills. Can you think of anything that might be causing this sudden weakness?
A. There are many problems for which I would suggest that you try a home remedy or a particular exercise and call your doctor only if they don't work. But this is not one of them. Your symptoms could be the result of several potentially serious conditions.