Simen Halle Haugen, one of the top Norwegian distance runners, joins us for part two of our discussion on the Norwegian double threshold training system. We suggest listening to part 1 before this episode if you haven't already done so. In this episode we go into more detail about how to implement double threshold work into a training program, the type of runners it might be suitable for, and where this system came from in the first place. We also ask the all important question - does it really work? Simen once again gives us some unique insights into his own training and the training of other top runners in Norway and we discuss how his training philosophy could be applied by runners of all levels. If you have enjoyed listening to Simen on Conversations About Running, please share with friends in the running community!