Getting old is tough! If I had known ten years ago that I would have this much trouble now, I would have done more to keep limber. My nurse practioner advises me to enroll in a yoga class; I've tried the yoga videos but not making much headway. And I used to walk 2 miles each day, now just going around the block is about all I can do before the knees start giving out. I tried water aerobics for people with arthritis and that was the most helpful so I hope to get back to it next week now that school is out. It gets disheartening some days ......