Kris Stallenberg 30-min Z2 (Endurance) Medium #10 Improve your pedaling dynamics with this endurance workout focused on cadence variation. The power target remains steady in Z2, but you will be prompted to alternate between low, normal, and high cadences. This challenges your muscles in different ways and improves efficiency across a range of pedal speeds, a valuable skill supported by training in the Coggan Power Zones. bike