I am pleased you received needed support, Mike. Some of my mentors with physiology expertise also helped me initially to add VO2max to my fitness regimen. Thank you for writing this informative and inspiring piece. You covered all key points and gave us valuable perspectives from your valuable experiences. Like you I use both aerobic and anaerobic workouts to enhance may maxima oxygen consumption which also increase my lactate threshold which I covered in another article. https://medium.com/sensible-biohacking-transhumanism/lactate-shuttling-for-metabolic-regulation-and-cognitive-function-80fde35ebbf