Double Threshold Training: Should High School Runners Be Doing It?
If you’ve spent any time on running social media or talked with teammates, you’ve probably heard the term double threshold. If you’re reading this, you’ve likely also heard of the “Norwegian method,” which has gained significant attention in recent years thanks to athletes such as Olympic champion Jakob Ingebrigtsen and triathlete Kristian Blummenfelt. The Norwegians have been measuring and testing…