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Mechanisms Of ACL Injury

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Mechanisms Of ACL Injury
The knee joint is very susceptible to injury due to of the mechanical demands and the reliance on soft tissue (e.g. ligaments) for support (Hamill & Knutzen, 2010). The knee is frequently injured while physically active and depending on the sport can account for 25% to 70% of reported injuries. Injury to the ligaments is often traumatic and occurs when a force is applied causing a twisting action of the knee (Hamill & Knutzen, 2010). ACL injuries commonly occur when the knee is flexed, internally rotated or in a valgus positioning while supporting weight (see figure 2). A further mechanism of ACL injury is if the knee joint is forced into hyperextension (Hamill & Knutzen, 2010), this is extension of the limb past the normal limit.
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