Completely false. Lots of people in their 20s have knee and back problems. Torn ACLs are common in athletes and people who participate in sports. I had a coworker a few years ago who had his ACL replaced; he was in his mid-to-late 20s.
Please re-read and reconsider the context of my post. This reddit-tier "must seek to contradict and attack others" behavior doesn't do anyone any good.
