What my 42 year old self would tell my 22 year old self.
Just want to thank you for your extremely valuable writings on Substack. I try to stay informed about developments in cardiac and cognitive health by following people like Peter Attia and Thomas Dayspring, and I've found your writings to be a wonderful new resource, in that you present the latest research findings in a particularly lucid, vivid, and economical way. Through reading you, I've come to a better understanding of a lot of questions that I had only a vague comprehension of before. (The effect of APOE4 status on cardiac health, for one example out of many.) Many thanks.
Could you please share more details on Zone 2 training based on heart rate (& lactate). Thank you for this wonderful article.