As a 50 +er this has become almost a constant theme for me..... OVER TRAINING! Guilt drives me CRAZY at the thought of taking a day off, or skipping a workout. Particularly when taking that morning moment to greet my pals on MFP, reading about their morning excursions. If you wake up the next morning, you should be able to train, right? WRONG!!!!! Work smarter NOT harder, if you want to get faster, or gain the edge. As we prep for race day, looking to hit our split times, regardless the discipline, you have to take time off to let your body recover. Exercise of any kind, is a destructive force on the body. Physiologically it's the means by which we tell our bodies we want to be faster and stronger. Tired / sore is the body's way of telling us, it got the message. In response, you have to give it the chance. Take responsible time off (not an excuse to be lazy). 24 hours, every 3rd or 4th day, and be sure to get close to 8 quality hours of sleep a night. Bragg about how you can pull the allnighter, and I'll see you when you finally cross the finish line!