Fitness

Yesterday, I linked to a study showing that the beneficial effects of high levels of cardiorespiratory fitness—the kind you build with cardio/endurance training, HIIT, and sprints—have no upper limit. At first glance, this study appears to bust the “myth” of chronic cardio and the U-shaped curve of endurance training and prove that the more you train,...

As many of you know, Brad is my longtime writing partner, host of the Primal Endurance podcast and host of the weekly keto show on the Primal Blueprint podcast. Our relationship goes back 30 years to when I was Brad’s coach during his career on the professional triathlon circuit. The start of Brad’s chronic plantar...