Why healthspan is a crucial component of longevity | Peter Attia, M.D.
In a Nutshell
Health span must be prioritized alongside any longevity goal, as living longer without preserving physical, cognitive, and emotional function is undesirable. Pursuing better health at any age delivers dual benefits: improved quality of life and likely extension of lifespan, often more effectively than conventional medicine's direct lifespan interventions. Most lifespan gains actually come from relentless focus on health metrics like strength, endurance, and emotional well-being rather than explicit longevity strategies.
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In the book, Peter Attia writes about the Greek god Tithonus who wished for immortality but forgot to ask for eternal youth. Tithonus became an indefinitely suffering human being who continued to age in perpetuity while his body declined. Any desire to live longer must be accompanied by a desire to preserve health span. If a person says they want to live to be 95, it is assumed they don't want to look like most 95-year-olds. The assumption is they want to live to 95 but function like a 75-year-old in the final years of life.
Health span by itself is valuable at any given age, whether it's 40, 50, 70, or 80. Having a better physical body, better cognitive mind, and better emotional health for your age always exceeds being below it. All the things done to improve health span are twofers - getting two for the price of one. When improving health span, lifespan is also improved.
Most of the benefits toward a longer life come solely from pursuing better health. If someone never thought once about trying to live a longer life and focused relentlessly on improving strength, endurance, stamina, balance, coordination, processing speed, working memory, emotional health, happiness, and relationships, they would capture three-quarters of the way toward optimizing lifespan. This is not a studyable question, but the conviction is strong that health span pursuit is valuable in its own right even if it didn't lengthen life at all.
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