Rampage

This story, by David Samuels, really picks up speed as it goes:

With two minutes left in his workout, Rampage mounts a final assault on the heavy bag. An invisible string seems to connect the fighter and the trainer who controls his daily rhythms. Both men are born-again Christians with an overpowering hunger for love, and each uses that weakness to manipulate the other throughout the six weeks of training camp. They speak in their own shorthand about a prospective hire at one of their gyms. "He don't say much. A Christian man, knows the Bible, don't eat pork," Rampage says, punishing the heavy bag with a series of brutal uppercuts.