Hi, I am now 63, and working in the agriculture industry driving trucks and tractors. About 15 months agouti had a knee opp with a 7 degree straighten and a steel plate put in. A check a year later revealed a good result and healing. The problem is I cannot walk normal resulting in slow movement and cannot trot or run. I have pain most of the time in the knee as though the bone is rubbing on the nerve and in bed the only relief is lying on my back. If I go to turn it is bad. I have to be real careful moving around during the work day. My weight is 105 kg. what is your advice ? Thanks graeme