That's it really. I seem to be growing stiffer and more achy by the day. If I sit for any length of time I hobble for a while when I get up. I can't bend and pick things up from the floor, look over my shoulder easily, climb over stiles without effort. I tire easily ( feel weak at the end of a 45 min walk). Sometimes my aching legs wake me up at night, though this comes and goes. I'm in a fairly active job ( on my feet for much of the day) and try to walk when I can but don't get much more exercise than this. Am I just unfit or do I need to go to the doctor?