Kris Stallenberg 45-min Z2 (Endurance) Medium #10 This workout simulates the variable effort of an outdoor ride while keeping the overall intensity firmly in the aerobic Zone 2. The repeated blocks of higher-end endurance work followed by active recovery challenge your body to clear lactate and recover efficiently. This is a practical application of the Coggan Power Zones, preparing you for real-world conditions where power is rarely perfectly constant. Stay focused during the transitions. bike