Much Ado About Zone 2: What I Learned Reading the Papers Instead of the Podcasts
My watch buzzed at 144 bpm on a climb, and I had to decide whether to walk because the internet says Zone 2 is magic. So I read the papers. The 80/20 rule comes from athletes training 10 to 13 times a week; at three hours of running a week, the denominator changes the answer. Plus my own numbers, with the caveats they need.