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 ...

Here’s an idea: do most of your training at a leisurely pace and, come race day, you’ll be nailing your goals like Kipchoge on an autumn Berlin morning. It may seem far-fetched, but it’s supported by ...