In this session, we focus on an incremental rise of VO2 uptake. This progression allows us to sustain prolonged levels closer to our VO2 max, versus shorter/higher-powered efforts. We do 3x 8min ON/OFF blocks, increasing from 20, 30, to 40sec 'On' while reducing the 'Off' durations. The 'Off' intensity is not a full recovery, so oxygen uptake is always being stimulated throughout the 8min blocks. We finish the session with a 4min build. For most athletes, you'll find yourself near your VO2 max within the last minute of this interval. Get ready for a solid workout!