This episode is the focal point of the previous VO2max episodes. We take the physiology from the previous episodes and use it to find easy ways to improve the effectiveness of any VO2max interval set. Ways to change your cadence, interval times, rest times, and interval intensities are discussed. Then we take apart a Ronnestad study on 30/15s and put it in context of VO2max and other fitness adaptations. We conclude with a training philosophy discussion on the physiology of true long term VO2max improvements.