Hey Smurfy,
Welcome to the Oseto Forum. I was wondering the same thing as Sherry, how old is your Father ? I also wonder if he has a bit of depression going on ? Your comment " just lies in bed " caught my eye.
Exercise usually does not aggravate osteoarthritis when performed at levels that do not cause joint pain. Exercise is helpful in osteoarthritis in several ways. First, it strengthens the muscular support around the joints. It also prevents the joints from "freezing up" and improves and maintains joint mobility. Finally, it helps with weight reduction and promotes endurance. Applying local heat before and cold packs after exercise can help relieve pain and inflammation. Swimming is particularly well suited for patients with osteoarthritis because it allows the person to exercise with minimal impact stress to the joints. Other popular exercises include walking, stationary cycling, and light weight training.
You also may want to set your Father up with an appointment with a Rheumatologist to receive medical advise and to help your Father learn more about his condition. A Rheumatologist can also guide your Father re pain medications.
Take care and I admire you for caring about your Father and looking for ways to help him. You are truly devoted to him.
Gentle Hugs
Kitt