Lifestyle Factors With the Strongest Longevity Evidence
Among all lifestyle interventions, caloric restriction has the most consistent preclinical data. Reducing caloric intake by 20-40% without malnutrition extends healthy lifespan in organisms from yeast to primates. The CALERIE-2 randomized trial showed that two years of 12% caloric restriction reduced multiple aging biomarkers in healthy adults, including inflammatory markers, metabolic risk factors, and thymic function.
Exercise remains the intervention with the most compelling human evidence. A 2022 JAMA analysis of over 650,000 participants found that those meeting physical activity guidelines had 33% lower all-cause mortality than sedentary individuals. Combining aerobic exercise with resistance training provided additive benefits beyond either alone. Even late-life exercise initiation meaningfully reduces mortality risk.
Sleep quality has emerged as a critical and often underemphasized longevity factor. People who consistently sleep fewer than seven hours or more than nine hours per night have higher mortality rates. During sleep, the glymphatic system clears metabolic waste from the brain including amyloid-beta, the protein that accumulates in Alzheimer’s disease. Chronic sleep deprivation accelerates biological aging on epigenetic clocks.
