Knee Pain / Knee Injuries
Knee pain can be related to overuse where small stresses are repeated a large number of times without allowing adequate recovery, for example running too much too soon, or excessive jumping. Or injuries can be acute where the injury is caused by an impact or twisting such as an anterior cruciate ligament injury. An overuse injury can also be considered to be acute if it is painful or inflammed.
Anterior Cruciate Ligament / ACL Knee Injury
A torn ACL is an injury or tear to the anterior cruciate ligament (ACL). The ACL is one of the four main stabilising ligaments of the knee, The ACL attaches to the knee end of the Femur (thigh bone), at the back of the joint and passes down through the knee joint to the front of the flat upper surface of the Tibia (shin bone). It passes across the knee joint in a diagonal direction and with the PCL passing in the opposite direction, forms a cross shape, hence the name cruciate ligaments.
The role of the Anterior Cruciate Ligament is to prevent forward movement of the Tibia from underneath the femur. The Posterior Cruciate Ligament prevents movement of the Tibia in a backwards direction. Together these two ligaments are vitally important to the stability of the knee joint, especially in contact sports and those that involve fast changes in direction and twisting and pivoting movements. Therefore a torn ACL has serious implications for the stability and function of the knee joint.