So I may be getting sick. I've got that almost-but-not-quite-fully-developed itchy throat, coughing, stuffy head thing going on. It's at the critical turning point where more then likely I will wake up tomorrow with either a full-blown head cold or it will have gone away. 

The thing is, I know my body and I have some control over which direction this goes. In the last 6 years (which is exactly when I started running), I've been sick for perhaps three days.  Caught a cold a year or two ago and it took me down. Other than that, I've been at where I am now... almost sick but never really crossing the line. The difference--and I know it sounds odd--is that I can make the mental decision whether to allow myself to be sick or not and my body almost always follows suit. 

The trick of it is...