Par for the course: 별 거 아닌 일

The most important task here was to let my body know in no uncertain terms that running this hard is just par for the course. When I say letting it know in no uncertain terms I’m speaking figuratively, of course. No matter how much you might command your body to perform, don’t count on it to immediately obey. The body is an extremely practical system. You have to let it experience intermittent pain over time, and then the body will get the point. As a result, it will willingly accept (or maybe not) the increased amount of exercise it’s made to do. After this, you very gradually increase the upper limit of the amount of exercise you do. Doing it gradually is important so you don’t burn out.

Haruki, Murakami