Kris Stallenberg 90-min Z2 (Endurance) Medium #06 This workout breaks up the endurance effort into manageable 12-minute intervals. This structure allows for brief mental and physical resets, helping you maintain a high quality of effort throughout the entire session. It's an effective way to accumulate time in Zone 2, as defined by the Coggan Power Zones, without the mental fatigue of a single, long block. The goal is consistent aerobic stimulus. bike