The population most at risk from PFPS are runners, cyclists, basketball players and other sports participants. Onset can be gradual or the result of a single incident and is often caused by a change in training regimen that includes dramatic increases in training time, distance or intensity, it can be compounded by wearing the wrong type of footwear.[1] Symptoms include discomfort while sitting with bent knees or descending stairs and generalised knee pain.[2] Treatment involves resting and physical therapy that includes stretching and strengthening exercises for the legs.