Evidence-based studies indicate that longevity is based on two major factors, genetics and lifestyle choices. Twin studies have estimated that approximately 20-30% of an individual’s lifespan is related to genetics, the rest is due to individual behaviors and environmental factors which can be modified. Although over 200 gene variants have been, according to the LongevityMap database, associated with human longevity, these explain only a small fraction of the heritability of longevity. Recent studies find that even modest amounts of leisure time physical exercise can extend life expectancy by as much as 4.5 years.
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