These articles have quotations from film adaptations of J.R.R. Tolkien's novel The Lord of the Rings and related works: 1  The Lord of the Rings.  J.R.R. Tolkien's The Lord of the Rings (1978)
This causes a twisting on the tibia and changes its relationship to your kneecap. This can cause tracking problems as well. If your quadriceps or hamstring muscles are too tight, they also will affect the mechanics of the knee and lead to compensation patterns that cause pain.
Aside from the fact that walking on a treadmill is an impact sport, knee pain can be caused by a lack of spinal rotation when striding, over pronation and incline running. Also, the treadmill maintains a steady speed which impedes your body's natural tendency to adjust its pace as necessary.