Ligament Sprain – You can injure your knee through a sharp change in direction with a fixed foot. Another common mechanism is landing poorly from a jump – common in netball, basketball and football. A blunt force hit to the knee, such as in football tackle, is probably the most common cause.
Patellofemoral Pain and ITB Syndrome – As the knee bends, the knee cap glides up and down in a groove on the end of the thighbone.
The knee cap can come out of alignment if there is abnormal muscle imbalance of the quadriceps and poor alignment of the lower limbs especially when walking or running. This can eventually lead to degeneration of the surface of either the back of the patella or the groove the knee cap sits in.
Patella Tendinopathy can be caused by some of these reasons:
- Sudden changes in training volume and intensity
- A change in training surfaces (ie running on pavement as opposed to grass)
- Flexibility deficits in the lower limb, particularly quadriceps and hamstrings
- Poor hip control
- Poor foot control