Hi, I am a very fit ( 5 10 , 155 pounds), 55 year-old with chronic lower back stiffness/soreness. Sore getting out of bed, and straightening up after I use the toilet in morning, also sore/painful straightening up when I get out of my chair at work, after noon-time work-out which is running/jogging. Also, if I am on my knees or bent over (yesterday working on my roof), very difficult to straighten up. I have no pain walking or running, or standing, or most other times.