My husband, aged 63, has worked hard all his life. He still works a very physical day & by the end of the week on Friday evening he will get up from his easy chair and stagger and nearly fall over. He suffers terrible cramps in his legs and has very painful knees. Only a warm rug over his knees or knee warmers gives him some relief. My 85 year old father walks with less pain and is more stable. We are at our wits end. What should we do?