An ACL tear can be caused by a rapid change in direction, sudden stopping, slowing down while running, landing a jump incorrectly, direct contact. Symptoms include a popping sound, feeling that ...

Whether you are a weekend warrior or a pro athlete, these injuries can happen to anyone and should be treated holistically.

It's rare to retear it nine years later, because the majority of people who have an ACL tear in the NFL don't play another nine years. If you don't have an ACL, you can walk in a straight line.