The Primal Endurance podcast Interval shows are published in between our full-length feature episodes published on Fridays. For the Interval episodes, podcast host Brad Kearns discusses various elements of the Primal Endurance approach, pulling from topics in the book/digital course and adding some candid and fresh insights. The Interval shows will keep you focused and purposeful with all of your workouts and lifestyle decisions.

Among the most common questions relating to the importance of training aerobically and the method of calculating, and rationale for, training at or below your maximum aerobic heart rate. Details on the adjustment factors to the "180-age" baseline calculation. Comparing and contrasting the Maffetone 180-age formula with the conventional approach of using percentage of max heart rate and ventilatory threshold. Hint: be conservative and avoid the risks of chronic exercise. This is a great show to refer to over and over to cement the idea that taking it easy and working the low end aerobic zone will pay great dividends to your racing performance at higher speeds.