This week's episode of The Sunday Shakeout features an in-depth training tutorial on the science behind threshold training. Threshold training, specifically lactate/anaerobic threshold training, has been popularized in the last few years by the successes of Jakob Ingebrigtsen and many other norwegian athletes. And rightfully so. Threshold training, if done properly is the shown to be the most effective training method to get faster at running and build your overall fitness. However, there is more to threshold training than what meets the eye. In order to fully comprehend and create an intelligent plan with threshold in it - both aerobic and anaerobic (depending on your peak race), you must learn the science behind it. This episode looks to clear up misconceptions on threshold and talk about not just anaerobic threshold, but also aerobic threshold.