Kris Stallenberg 120-min Z2 (Endurance) Medium #06 This workout is structured as a pyramid, gradually increasing intensity to the top of Zone 2 and then decreasing back down. This session maximizes time in the endurance zone, as outlined by the Coggan Power Zones, while keeping the effort dynamic. The progressive build and regression helps teach pacing and control, making it a mentally engaging way to build your aerobic engine. bike