Sleep, stress and exercise: your longevity toolkit | Kayla Barnes-Lentz

Sleeping under seven hours predicts earlier death

Research shows sleeping under seven hours a night is linked to shorter life expectancy, rivaling obesity as a risk factor. Cutting sleep reduces time for cellular repair, hormone regulation, and energy restoration.

"Sleeping under seven hours a night is linked to shorter life expectancy, and that effect often rivals obesity and surpasses physical inactivity or socioeconomic factors. When you cut sleep, you cut time for cellular repair, hormone regulation, and energy restoration."

Get outdoor light within 30 minutes of waking

Morning outdoor light suppresses melatonin, sets the internal clock, and starts the countdown for nighttime melatonin to rise. Even on cloudy days, outdoor light is far stronger than indoor lighting.

"Get outdoor light within 30 minutes of waking. This suppresses morning melatonin, sets your internal clock, and starts the countdown for nighttime melatonin to rise. Even on cloudy days, outdoor light is stronger than indoor lighting, and this single step helps stabilize sleep timing."

Create total darkness and eliminate artificial evening light

Even small light leaks from streetlights, clocks, or hallways fragment sleep cycles. Switching to dim red or amber bulbs after sunset helps the nervous system recognize night has arrived, shortening time to fall asleep.

"Create total darkness where you sleep. Even small light leaks from streetlights, clocks, or hallways keep parts of your brain on guard and fragment sleep cycles. Use blackout curtains, a sleep mask, and remove glowing electronics."