My son in law had knee replacement about a month ago with cadaver parts. He's riding his bike on a 32 mile round trip every day. Goes to the gym everyday. He's a bull rider and had St Lukes Tempe sports medicine guys with him through the last rodeo season everytime he rode then they did the replacement. He's very fortunate they wanted to get experience and info on rodeo injuries. Don't skimp on the PT and ice is your best friend. Please be careful going in & out on the steps. I have been without an ACL for 27 yrs and all is good so far. Good luck & happy camping.