The Long Run Recommendations for Marathon and Ultramarathon races

Of all the aspects of running that I've written about, few have been as important and difficult as this article on the Long Run. The importance of the Long Run for marathon and ultramarathon training is widely accepted, but the lack of scientific evidence around the Long Run has created conflicting opinions. I've been thinking about this article on the Long Run for many years, and I've been actively working on it for some months. The result is 23 guidelines that aim to provide usable advice, accompanied by the underlying rationale. I've also tried to capture alternative views and limitations of the advice by explicitly stating the possible caveats. http://fellrnr.com/wiki/Long_Run