How to determine Zones1 & 2 THEN how to modify the zones as fitness changes. I end with three tips; (1) don't push power/pace to the top of Zone 2; (2) add frequency and extend duration; (3) don't push heart rate early in an endurance workout, let heart rate rise naturally. LINK for the Zone Table : https://www.teamakerdahlie.com/training/you-are-training-too-hard-and-will-never-reach-your-full-potential
