Good for you!
Yeah, stories and novels use totally different sets of muscles. You can't train for one with the other, any more than... I dunno, you train for sprints by running marathons. I mean, yeah, the general fitness (skill level) helps, but in the end you still need to do what it is you plan on doing...
And in this extremely pained metaphor, by "you" I mean "me."
Also, babies are heavy.