Training Zones for Ultrarunning: Why Are There Five And What Do They Mean?
CHOOSE YOUR FORMAT ►WATCH THE VIDEO ►LISTEN TO THE PODCAST ►READ THE ARTICLE Training Zones for Ultrarunning: Why Are There Five And What Do They Mean? As a runner you’ve almost certainly seen the chart: five columns, color-coded, with heart rate or pace ranges that feel precise and scientific. Zone 2 for fat oxidation. Zone …









