Be careful not to overdo it resulting in injury. Avoid dangerous things that stress poor parts of the body, such as the knee's ligaments. Some things never he

Be careful not to overdo it resulting in injury. Avoid dangerous things that stress poor parts of the body, such as the knee's ligaments. Some things never heal back once injured, such as most of the meniscus-- only a small part of it has blood flow. Probably similar with other cartilage body parts.