Cutting Sports: Sudden changes in direction or rotational movements are common mechanisms of the "non-contact" ACL injury. Hyper-extension or hyper-flexion can also damage the acl. Contact injuries, such as a blow to the side of the knee, can also often result in an ACL injury.
Answered 1/12/2015
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Pivoting and cutting: Acl injury commonly occurs with pivoting and cutting activities. Patients often recollect a definitive pop and near immediate swelling at the time of injury. Subsequent complaints of buckling and giving away are also common.
Answered 10/3/2016
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