Robert: My name is Robert I'm from Englewood, California; how long does it take for a ACL injury to heal?Andrew Gregory: Robert that's a common question we get asked is will my knee after turning my ACL the answer is it won't ACL the ligament inside the knee that doesn't heal and so this something you have to get fixed and once you had it fixed surgically usually that graft they put in this place will heal after about 6-8 weeks average it takes another total about 4-6 months for you re have your knee in order to go back and play sport after getting it fixed so after surgery about 4-6 months to return to playing sports.