Why is it that the human lifespan has increased dramatically but our “health span” has decreased substantially... so much so that the last twenty years of our lives are often miserable?

I am a 74-year-old athlete, doctor, and heart disease survivor whose life became so challenging that at one point, I thought I’d end it all.

So, how did I go from coronary heart disease at age 56—including failed stents, cardiac arrest, and open heart surgery at age 61—to climbing the highest freestanding mountain in the world at age 62?

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