Blog
Endogenous melatonin: Why your body's own sleep hormone matters more than any pill
How endogenous melatonin supports circadian timing, sleep and aging biology, plus evidence-informed ways to protect natural nighttime production.
Single leg balance test: The 10-second test that predicts mortality
Failing the single leg balance test is associated with 84% higher adjusted mortality risk. Learn age benchmarks, caveats, and 8 exercises to improve balance.
Grip strength and mortality: a practical biomarker of healthy aging
Grip strength is linked with mortality, disability, sarcopenia, and biological aging. Learn the evidence, age norms, testing protocol, and exercises.
30-second chair stand test: safe setup, scores, and longevity
Learn the 30-second chair stand test setup, non-slip safety tips, age norms, and what sit-to-stand scores reveal about strength, fall risk, and longevity.
Critical power: The endurance metric that predicts aging better than VO2 max
Critical power marks your highest sustainable intensity. Learn how CP, W', durability, and VO2 max shape endurance, aging, and training decisions.
Running economy: Why efficiency matters more than speed for longevity
Running economy measures how efficiently your body uses energy at a given pace. Learn why this metric predicts aging better than speed, and how to improve it at any age.
Lactate threshold: The true fitness indicator that predicts how you age
Learn what lactate threshold is, how it declines with age, and 7 proven strategies to improve it. The fitness marker that predicts endurance, longevity, and biological aging.
Autophagy: The cellular cleanup system behind healthy aging
Autophagy recycles damaged proteins and organelles. Learn what human research supports, how fasting and exercise may help, and what to track cautiously.
Glycation and AGEs: How sugar silently ages your tissues
AGEs cross-link proteins, stiffen arteries, and amplify inflammation. Learn how glycation forms, how to track it, and practical ways to slow new AGE buildup.