Here's the crazy thing — it's louder. As soon as I stop running, my brain is already craving the next run. For example, the day after my first back-to-back weekend long runs, I fell into a miserable slump. I turned to my Facebook and Twitter friends and found out I wasn't alone. With a few tweaks to my diet and sleep (more of both), I'm finding that recovering from long endurance runs is easier. That said, ultra running training, overall at this stage in my life, is far more demanding than I thought it would be. With each run, not only am I trying to find the perfect balance of speed and distance, but also how much time my brain and family can tolerate my time on the trails. When it came to running, I never knew there could be too much of a good thing.