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Download your free guide: PATELLOFEMORAL PAIN SYNDROME (RUNNERS KNEE).
Runner’s knee, more scientifically called patellofemoral pain syndrome (PFPS) is a condition which affects the cartilage on the underside of the knee cap (patella) and the structures which support it, as it moves up and down over the groove on the femur (thigh bone) when you bend and straighten your knee. The injury happens to both top runners and amateurs alike, with some statistics showing it accounts for nearly 50% of all running injuries.