Kris Stallenberg 120-min Z2 (Endurance) Medium #08 This workout enhances a standard Zone 2 ride with brief, high-cadence 'spin-ups'. The foundation of the ride is solid endurance training per the Coggan Power Zones. The spin-ups are not for power, but to activate neuromuscular pathways and improve pedaling mechanics without adding significant metabolic stress. This helps break up the monotony of a long ride and improves your pedaling efficiency. bike