Do you know that unlike the tendons ligaments and cartilage joints are the only part of musculoskeletal system that has no direct blood supply? Yes the joints that help us walk run and jump with ease have no direct blood supply. This makes them prone to degeneration. Thus our joints require movements (exercises) to stimulate blood flow toward them. Oxygen-filled blood brings joints the required nutrients rejuvenates dead cells and washes away the waste with synovial fluid. This waste would otherwise build-up in joints and harm their functioning. Without proper daily exercise of the joints you are increasing the risk