Being a 'merican you might know a bit about Adrian Peterson's rehab? He tore his ACL and MCL in his knee. Apparently a few days after his surgery he wanted to try and walk on it - and the doctors didn't believe it was possible. He was in pain, but the knee was 'together' so he wanted to start his rehabilitation earlier, in order to get back to running earlier - and in turn get back on the field practicing as soon as possible.What I've heard from some doctors is that a lot of the recovery from a blown knee ligament is just mental. Even if they've surgically repaired the ligament to where its stronger than it was before and should never rightfully be a problem again, it ruins a lot of athlete's careers simply because they're unable to have that trust in their knee again, and because of that they simply don't perform at the same level.
The next season he was the NFL's MVP!