Lets face it, things happen, life happens. There are struggles every day that you have to fight through. What are you going to do? Give up?
Push through those crappy days, those days where you just don't have it, those days you'd rather sit on the couch than head to the gym.
Every reward, every achievement lies on the other side of the suck. You face the suck. You accept it. Then you start throwing elbows.