Once upon a time, there was a boxer named Jim. Jim loved boxing and would train up to 3 hours a day, working hard on his conditioning and generally turning himself into a hell of a fighter. Jim knew he was good, in shape, and decided to reward himself with a vacation -- a couple weeks cruising the Caribbean.
Jim will be the first one to tell you that a cruise quickly turns into a battle of who can be the bigger slug. With food everywhere, the most exercise you get is walking ten steps from bar to eatery to pool and back again. Sure there is a fitness room, but Jim wasn't there to workout. He was there to relax, drink himself silly, and eat whatever he wanted -- and he did just that.
By the end of the vacation, Jim had thoroughly indulged himself, enjoyed himself, and was ready to get back in the gym. On returning home, there was a message waiting for him -- his coach had setup a fight -- the catch -- it was in three days.