Dr. Nana Sarpong, an orthopedic surgeon at NewYork-Presbyterian and Columbia, explains how joints work, why they wear down, and what people can do to protect their joint health at every stage of life. He breaks down common joint conditions like osteoarthritis and rheumatoid arthritis, debunks widespread myths, and shares practical, evidence-based guidance on protecting our joints through exercise, weight management, and treatment options—from physical therapy to joint replacement surgery.