After I turned 52, I started noticing a small problem getting worse. My knees and joints were really starting to hurt. They did not want to bend, squat or even fold a leg under me...and there was no getting down on my knees. I'm an active gardener and use to walk alot but had given up the walking several years ago because I never had the time. My weight is in the normal range, and I didn't have any health issues. I kept complaining to my friends til one day, someone a little older than me said since I was getting older ,that I problaly had Arthritis( shock!! me that old!!) The next morning I was on my good ol THREADMILL walking 1 mile a day. It is AMAZING! within 2 weeks my knees were 50 % better. Now I walk every morning and sometimes in the evening too. I feel so much better. So for everyone with a dusty threadmill, get on it and walk. Heck with the weight issues! do it for ur mobility.