There's always a danger in likening sports to war. You may offend combat veterans because sports are not life or death. Except in the rarest of instances, in sports you live to play another day.
I do think insight can be gained through recognizing similarities, however, so please remember the definition of analogy a likeness of two things that are otherwise dissimilar and please don't take offense when this article likens dieting to one of the many unsavory elements of war, being held captive.
In both situations an outside force imposes control on you.