Speed + little fat = your next marathon time (or half) RunningHub under [http://www.runninghub.org] (http://www.runninghub.org “http://www.runninghub.org”) has taken one of our formulas for the calculation of the competition time. In detail, they explain which elements are essential for the marathon runner in training.All explanations can be read below http://www.runninghub.org/resources/show/2