Osteoarthritis: A degenerative joint disease characterized by the breakdown of cartilage and changes in bone structure. Rheumatoid Arthritis: An autoimmune disorder that leads to inflammation and damage of the synovial membrane and cartilage. Osteoporosis: A condition marked by reduced bone density and increased fragility. Muscular Dystrophy: A group of genetic disorders leading to progressive muscle weakness and degeneration. Tendinitis: Inflammation of the tendons, often due to overuse or injury.