A few years ago had a flare up of chondromalacia patella which is arthritis of the back side of the knee cap. My knee would want to collapse while weight bearing with about 30 degrees of deflection. It was getting worse by the week.

Doc suggested that I take glucosamine. Worked wonders. No more pain. I take a pill about every other day. Knee is back to normal.

Probably more related to old age, my foot started hurting when I first weighted it in the morning. Long story short - now wearing a foot orthosis (arch support) inside my shoe. Works wonders. Those gel liners at Wal-Mart don't do the trick. You need support, not comfortable padding.

I have two now that I rotate through my shoes. My prosthetist made them for me and I highly recommend them.