An ACL sprain is when the ACL is overstretched (but not torn). ACL Injury Grades. The severity of the ACL injury is graded from 1 to 3. Grade 1: The ligament is intact, and the joint is stable, but there is minimal stretching and some microscopic tearing of the ACL. Surgery is typically not needed.

What does an ACL sprain feel like?

A loud pop or a “popping” sensation in the knee. Severe pain and inability to continue activity. Rapid swelling. Loss of range of motion.

Can you walk with a sprained ACL?

The short answer is yes. After the pain and swelling subsides and if there is no other injury to your knee, you may be able to walk in straight lines, go up and down stairs and even potentially jog in a straight line. The ACL (anterior cruciate ligament) is an important ligament that provides stability to the knee.