To answer your question, IMHO, fitness is a very necessary part of being prepared.

Unfortunately, in my day to day working/living routine, I am getting very little exercise. I am riding my bike more, when I am at home. I am trying to develope the habit of walking my tow while I am underway.

The weight-lifting, push-ups, etc workout just doesn't fit into my mindset so I am trying to get my exercise in other ways.