Kris Stallenberg 75-min Z6 (Anaerobic Capacity) Medium #10 This 'Kitchen Sink' workout throws a mix of anaerobic interval durations at you to build a versatile top-end. By varying the length and intensity of the efforts from 30 to 90 seconds, you'll challenge your body to adapt to unpredictable, race-like scenarios. This session improves your all-around ability to handle different types of hard attacks. bike