Kris Stallenberg 75-min Z2 (Endurance) Medium #05 This workout uses low-cadence intervals to build muscular endurance and strength while staying within the aerobic Zone 2. By reducing cadence, you increase the force required for each pedal stroke, which can lead to strength gains without high cardiovascular stress. As defined by the Coggan Power Zones, this is an effective way to add a different stimulus to your endurance training. bike