Debunking “Chronic Cardio:” How Running Keeps you Lean, Fit, and Young
Nice job providing a civil counterpoint, Jason. I did want to point out a nuance in Mark’s point about “Chronic Cardio” that I missed initially. As I read it, his message was not as simple as: “Running is bad; never do it.” In “The Primal Blueprint,” he doesn’t even use a runner to illustrate what he means by Chronic Cardio. Rather, he discusses a hypothetical woman who wakes up super-early to go to intense Spinning classes multiple times a week and then rewards herself with a big juice or smoothie afterwards. By doing so, she compromises her sleep (which messes up her metabolism), redlines her HR for extended periods of time (enough to create cortisol issues), and consumes liquid sugar that likely outweighs her “calorie burn” from the workout. Then, she wonders why she is not getting lean. Having suffered through a couple of Spinning classes while recovering from an injur...