The first weeks are mostly your lungs burning and your brain inventing reasons to stop, and the simplicity that makes it easy to start also means there's nowhere to hide from how hard it is.

Then somewhere around the point you'd normally quit, your breathing settles and the noise in your head goes quiet.

There will be cold mornings, sore knees, and runs that feel like punishment, but also the clean, uncomplicated lightness afterward that keeps pulling you back out the door.

The simplest way to get fit and clear your head.