The next frontier in training science, currently being debated in publications like the International Journal of Sports Physiology and Performance, sounds like it was torn from the pages of Robert Pirsig’s 1974 road novel, Zen and the Art of Motorcycle Maintenance. Pirsig’s narrator is obsessed to the point of madness with the seemingly intractable question of how we know what is good. “Some things are better than others,” he proclaims, “that is, they have more quality.” That’s true of training, too, according to Norwegian sports scientist Thomas Haugen: some workouts are better than others, in ways that aren’t necessarily indicated by stats like pace, power, heart rate, and cadence.
Earlier this year, Haugen, a professor at Kristiania University College in Oslo, published a paper with colleagues attempting to transform this observation into a more concrete definition of training quality—and suggesting ways that athletes and coaches can improve it. It’s a riddle Haugen has been contemplating since the 1990s, when he was a sprinter and an assistant coach with legendary sprint guru Leif Olav Alnes,…