Because of the normal valgus alignment of the femur and tibia (Q angle) the quadriceps can not run in a straight line from origin to insertion. This angle is often erroneously cited as the cause of PF problems. Certainly this Q angle can be excessive (think dynamic rather than static), but it is rare (and abnormal) to find someone with a “straight leg”. If a Q angle is present in almost everyone, we must consider why the body was designed this way.