The first rule of scientific fight club is that you have to agree on what you're fighting about. A newly published debate on the merits of polarized training in endurance athletes, in Medicine & ...

Polarized training is based on a clear 80/20 distribution: 80% of your training at low intensity (max HR 65–75%) and 20% intense (at or above the anaerobic threshold), while the middle zone is largely ...

There are numerous debates over different training philosophies, mainly the “big three” of sweet spot, HIIT (high-intensity interval training), and polarized training (80/20). The challenge of these ...

Alex Hutchinson is a National Magazine Award-winning journalist and Outside’s Sweat Science columnist, covering the latest research on endurance and outdoor sports. One of the big debates in endurance ...

Add Yahoo as a preferred source to see more of our stories on Google. The first rule of scientific fight club is that you have to agree on what you're fighting about. A newly published debate on the ...