As soon as my feet hit the floor this morning and I tried to stand up, I had sharp pains in my left heel. They gradually loosened up after an hour or so, but it sure was painful. I opted to just read my Bible and put the running to see how it feels after a day of rest. I thought it might be Plantar Fasciitis as I remember reading about this in one of the many running books I have read in the past couple of months. That's exactly what it is -- and I am glad to know that it is fairly common and not serious at all.