We've all been there: sitting alone on the couch while our spouses disappear into the night to run another 10K.

We've all felt the sting of rejection: "I'm sorry, honey, I have a long run tomorrow" - as he leaves you for a solitary, predawn hour of running.

We've all wondered: "Is it the running that's the problem, or am I just not enough?"

Why Do Runners Cause Friends to Divorce? Why Do Runners Cause Family Problems? Why Do Runners Cause Relationship Problems?