The commonest method of arthritis, osteoarthritis is as a result of progressive putting on down of cartilage over time. This restrictions the range of motion and triggers pain, stiffness, weak point and swelling of the knee. Kingsley Tay our national Seashore volleyball athlete working with chiropractor Jesse Cai Kingsley suffers https://www.theorthopaedicandpainpractice.com/knee-pain-in-older-patients-ages-55/