Kris Stallenberg 60-min Z2 (Endurance) Medium #01 This workout establishes a solid foundation with a prolonged, steady effort in the heart of Zone 2. The main 45-minute block is designed to improve metabolic efficiency and aerobic base, crucial for long-distance performance. According to Coggan Power Zones, this intensity promotes fat oxidation and builds fatigue resistance without significant strain. Focus on maintaining a consistent power output and a smooth pedal stroke throughout. bike