Tag: Zone 1

• Weekly Newsletter – The 80/20 Rule & Analyzing Heart-Rate Zones

  

  If you’ve consumed any endurance content within the last few years, you’ve likely heard about the ‘80/20 rule’. It’s a great starting place, but requires a lot more nuance and knowledge of heart rate zones than at first glance. Here is how to analyze your own heart rate data, using examples from mine as a…

  Rhys Desmond

  September 27, 2025

  Trail Running, Training Theory

  80/20 Rule, Coaching Newsletter, Easy Running, Hard Workouts, Heart Rate, Heart Rate Zones, Running Heart Rate, Trail Running, Training Theory, Ultra-Trail Harricana 28K, Weekly Newsletter, Zone 1, Zone 2