I'm 39, and have ran on and off since I was a young teenager. I've been running regularly now for about 4 years, and started barefoot running almost 3 years ago. I am regularly running 10 miles a week or so (which I'm really happy about). I'm in the best shape I've ever been, everything physically feels great. I love the feeling of running. However, and I think it's been happening for awhile, but sometimes the simplest things are hard to see…I have noticed that I become a bit of a zombie during the time that I'm not running. Not real happy, somewhat paranoid, kind of depressing thoughts go through my head…and not much energy. If I take a few days off I notice that my mood and my general outlook on life really improves and I really feel more "normal". I hate to quit or even cut down my running because (to me) I've gotten to a really good point in my running. Not sure what to do!