Hello, according to what you said, rheumatoid disease is a common disease, and moderate exercise is helpful to the recovery of the body. It is suggested that the elderly can choose some full-body exercises according to their physical condition and hobbies, such as swimming, walking, jogging, dancing, aerobics, Tai Ji Chuan, qigong and so on. If they are cold, they can swim in the hot springs. Swimming is a good whole-body exercise, which not only enhances the coordination of the body, but also greatly reduces the friction of the joints. I hope it helps.