Kris Stallenberg 120-min Z2 (Endurance) Easy #02 This session focuses on building endurance while breaking the monotony with short 'spin-ups'. The majority of the ride is in zone Z2 (Endurance), aligning with Coggan Power Zones Level 2. Each 25-minute block concludes with a one-minute period of higher cadence at the top of Z2, designed to improve leg speed and pedaling efficiency without adding significant stress. This helps develop neuromuscular coordination under light fatigue. bike