A common thing you hear when training is, “How can you run 60 miles in a week?” or “You are racing how far, how is that possible?” when you become consumed by the running community doing a 10 miler or 80 miles in a weeks become routine and just the new normal. Well take a step back and thing just how far you really our traveling on your feet and how evolution has lead you to this point. Recently there was this great post brought to my attention by a site contributor. Its a video explaining our evolution into creatures capable of traveling long distances on foot, enjoy. Remember understanding will help you RUNBEST!