Anterior Cruciate Ligament (ACL) Injuries (cont.)
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Anterior cruciate ligament (ACL) injuries are caused when the knee is straightened beyond its normal limits (hyperextended), twisted, or bent side to side.
Typical situations that can lead to ACL injuries include:
Inactive people and some older adults who have weak leg muscles may injure their knees during normal daily activities. But they usually injure bones, not ligaments.
When contact causes an ACL injury, it can be from playing a sport, from a sudden and severe accident, or from less obvious contact injuries. In football, receiving a clipping contact injury—in which the bent knee is struck from the outside—can cause an ACL injury.
eMedicineHealth Medical Reference from Healthwise
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