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Longevity

Longevity practice

Sleep and aging
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Compared with younger adults, how much sleep do healthy older adults need?
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The evidence-based science of a longer, healthier life
Learn the evidence-based science of healthspan — how to live longer AND stay healthier — from what large, long-term studies actually show, not from supplement ads or fad protocols. Understand the behaviors that move the needle most: cardiorespiratory fitness (VO2max) and muscle strength, quality sleep, a plant-forward eating pattern, not smoking, moderating alcohol, and keeping blood pressure, cholesterol, and blood sugar in check — plus the powerful role of social connection and a sense of purpose. Just as important, learn to think critically about longevity claims: correlation vs causation in nutrition epidemiology, why there is no proven anti-aging pill, the real limits of “blue zones” and biological-age tests, and how survivorship bias distorts centenarian stories. Builds on Human Biology and Nutrition. Held to the strictest evidence bar — established consensus only, no hype. Educational only — general healthspan science, not medical, diagnostic, or personalized health advice.
• Meets you at your level — never too easy, never too hard.
• Adapts every question to how you’re doing.
• Tracks your level over time. Skill practice, not a test.

New here? Read the Longevity guide

A free 19-minute primer — the mental model, the mistakes beginners make, and what to practice first.

Curriculum

181 concepts across 26 chapters, from foundations through advanced practice — each one a concept the adaptive question bank can teach and test.

A. Aging, lifespan and healthspan

9

B. Demography and epidemiology of aging

8

C. Evolutionary theories of aging

7

D. The hallmarks-of-aging framework

8

E. Genomic instability and DNA repair

6

F. Telomeres and replicative limits

7

G. Epigenetics and biological clocks

6

H. Proteostasis and cellular quality control

7

I. Nutrient sensing and metabolic signaling

6

J. Mitochondria, energy and oxidative stress

6

K. Cellular senescence

7

L. Stem cells, regeneration and tissue renewal

6

M. Inflammaging and intercellular communication

6

N. Immune aging

6

O. Cardiovascular aging

7

P. Metabolic aging

6

Q. Musculoskeletal aging

7

R. Brain aging and cognition

8

S. Sensory and organ-system aging

7

T. Cancer and aging

6

U. Frailty and geriatric syndromes

7

V. Physical activity and longevity

8

W. Diet, caloric restriction and longevity

7

X. Sleep, circadian rhythm and stress

6

Y. Social connection, purpose and mental health

7

Z. Measuring aging: biomarkers, trials and claims

10
View the full curriculum →
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