Some days, I am just in a mood. I don't know what you call it, maybe stressed, bored, lonely, angry, sad, anxious, or tired. I call it "getting into a funk." When it happens, I have allowed my circumstances to dictate my attitude and my thinking and then—bam! Before I know what hit me, I'm in a full-blown funk. While I like to exercise when a bad mood rises, others turn to unhealthy habits like emotional eating or smoking. When you're upset, stressed or otherwise not feeling like yourself, exercise—and the mood-enhancing endorphins it produces—can be the best thing for you. Don't you believe me?