We can improve heart and lung function without repeated bouts of long, slow distance. In fact, this popular training method is antithetical to developing a broad range of health and fitness capacities.

The “cardio craze” (step-aerobics, heart-rate monitor use, etc.) is largely a function of the fitness myth that “cardio”—aerobic training—should be separate and distinct from weight-training, anaerobic training or athletic training, in general. Nature neither favors nor bears regard for a difference in exercise types, and neither should you.

Decades of research show that every time you raise your heart rate, you perform aerobic work. Our workouts are more beneficial because they train multiple energy pathways at once.

For more on our running-specific training program, click here.