Kris Stallenberg 120-min Z6 (Anaerobic Capacity) Easy #10 This session introduces variability by mixing 30-second and 45-second anaerobic efforts within a single set. This mimics the unpredictable nature of racing, where you must respond to attacks of different lengths. By alternating between shorter, sharper bursts and slightly longer sustained efforts, you build a more versatile and robust anaerobic system. bike