As a young college guy with a half bum knee and a half bum back, don't push yourself because you think you will be able to bounc back at a later date.
I was invovled in a negative helicopter-ground interaction as a result of enemy fire and missed up my lower back and subsquently did even worse damage by not waiting until I was 100% by going out and doing stupid things.
Patience is a virtue.
NRA Life Member
Ladyfriend: "I need help with the leaves in the yard"
Me: "Controlled burn?"
LadyFriend: "I forgot my Boy Scout turned into an infantry officer."