Apparently, I can no longer laugh in the face of the warning "Lift with your legs, not with your back".  For the first 24 years of my life, I ignored this rule of thumb and saw no ill effects.  I lifted with my back all the time.  Sometimes I would purposely lift things without my legs just to prove how invincible I was. 

However, in the past two months, I've hurt my back bad enough to know that I'm no longer invincible.  For 24 years, I was fine.  Now that I'm 25, it's completely different.  It's all starting to go downhill. #health