Kris Stallenberg 75-min Z2 (Endurance) Pushing #07 The Z2 Pyramid workout is designed to build endurance through a long, continuous, and variable effort. You will gradually ramp up through your endurance zone, hold the peak for a solid 30 minutes, and then ramp back down. This simulates a long, steady climb followed by a descent. This structure, guided by Coggan Power Zones, is excellent for improving aerobic capacity and teaching the body to be efficient at different outputs within Zone 2. The long central block is a great test of mental focus. bike