Kris Stallenberg 60-min Z2 (Endurance) Pushing #03 This workout utilizes long, gradual ramps to build time across the entire Z2 (Endurance) spectrum. By slowly increasing the intensity from the bottom to the top of the zone, you'll improve aerobic efficiency and stamina. This method, aligned with Coggan Power Zones principles, is excellent for developing a sense of pacing and sustained effort. bike