Kris Stallenberg 120-min Z2 (Endurance) Pushing #06 This session uses descending interval lengths at a progressively increasing Z2 intensity to build endurance and mental toughness. As the intervals get shorter, the power nudges higher within the Z2 range defined by Coggan Power Zones. This structure helps break up a long ride mentally and prepares you to finish strong. It's an excellent workout for building fatigue resistance and pacing strategy. bike