This resonated with me because it touched on two of my interests, writing and exercising. It seems to me that what Mike is talking about is the discipline of writing. Lots of people favor different approaches to writing but one thing they share in common is the discipline to write consistently, something Mike addresses here.

Blogging is a specific kind of writing, of course, but whatever your goals are with it, you have to stay consistent and, yes, warming up and regular stretching of the muscles is required.

I'm also tempted to stretch the analogy further, thinking about my own running habits. Should I listen to James Brown on my headphones while I write, or rap music? Should my writing go around and around in a circle, or stretch out into new horizons? Do I have the right outfit for writing? Will I be too warm? What about headgear?

That's the thing about analogies. Like muscles, they can be stretched too far!