亚军的膝盖（髌股关节应力）

奔跑者的膝盖或髌股压力是当膝盖骨（髌骨）摩擦大致抵靠股骨（股骨）的端部的膝盖移动时。

Runner’s knee may be caused by a structural defect, such as a kneecap located too high or too low in the knee joint, off-centre insertion of the muscles into the kneecap, tight hamstrings, tight Achilles tendons, and weak thigh muscles – which normally help stabilize the knee. Weak thigh muscles are the most common treatable cause of runner’s knee; these weak muscles allow the kneecap to move sideways and rub against the thigh bone.

第二种常用的可治疗的原因是脚的滚动到外侧（内旋）过度当步行或跑步而前大腿肌肉（四头肌）拉膝盖骨向外。总之，这些力导致膝盖骨摩擦大腿骨结束。