Sleep

Body composition is inherently influenced by various factors, with physical activity, sleep, and stress being among those most amenable to individual regulation. These factors represent modifiable determinants that individuals can actively manage.

An analysis of biological clocks throughout the human body suggests that too few hours of sleep—and too many—may speed aging in the brain, heart, lung, and immune system and is associated with a wide range of diseases.

The greatest gains in longevity — 9.35 years — and health span — 9.46 years — were achieved with a combination of lifestyle changes including moderate exercise, quality sleep, and a healthy diet.