I just turned 50 and it seems like my whole body hurts. The most bothersome is my legs and knees. At night when I am laying down my knees and legs ache. When I am in a sitting postion and go tho stand up both knees are painful. When climbing stairs they hurt alittle, but going down stairs hurts more. When I lower myself to the floor to my knees it kills getting up and down. Am I just getting old??