Paul Rouse: Training to become a middle-aged boxer. What could go wrong?

I have a plan. The question is what will happen to that plan when I get punched in the face
At the end of February, I am to make my debut as a boxer. My friend Murt has appointed himself as my coach. He has never boxed either, but being reared on a diet of Rocky films and Muhammad Ali television appearances means he feels well-placed to direct operations.