For over a dozen years, I’ve railed against what I call “chronic cardio“—the excessive, unrelenting endurance training I did for the better part of three decades. Most of my health issues cleared up when I stopped stopped running and training for marathons and triathlons, removed the refined grains and sugar I ate to support my endurance training, and began taking it easy. Explore the MDA archives and you’ll read all about the downsides of chronic endurance training, as well as my experiences in that world. Next to Primal living, most people probably know me best for being against “chronic cardio.” It’s kinda my thing. As a result, a lot of people have this idea that any type of endurance training is verboten and totally antithetical to the Primal way of life. That’s a misconception, albeit an understandable one. But it’s persistent. I have been outspoken against chronic cardio. I’ve also released a book called Primal Endurance. How do I square my distaste for chronic cardio with the fact that I wrote an entire book devoted to endurance training?

(This Mark's Daily Apple article was written by Mark Sisson, and is narrated by Tina Leaman)