A recent analysis published by Oxford University Press found that sleeping fewer than seven hours a night may shorten lifespan more than poor diet, lack of exercise, or even social isolation.
Only smoking had a stronger negative effect.
Sleep affects nearly every system in your body: heart, immunity, brain. Memory consolidation happens while you sleep. So does muscle repair — which matters if you’re lifting weights or walking regularly.
Yet about one-third of adults don’t get enough rest. And adults over 50 often struggle more, thanks to stress, hormonal shifts, medications, or simple habit changes.
Research from the National Sleep Foundation suggests that consistent sleep and wake times improve sleep quality. Other studies show that resistance training improves sleep depth and reduces nighttime awakenings, especially in older adults.
In other words, exercise helps you sleep — and sleep helps you benefit from exercise.
A few simple habits can help:
- Keep a regular bedtime.
- Limit screens an hour before bed.
- Keep your bedroom cool and dark.
- Get daylight exposure early in the day.
- Strength train two to three times a week.
If you want to age well, build muscle, stay sharp, and feel better during the day, don’t overlook what happens at night.
Your body does some of its most important work while you’re asleep.
Holly Kouvo is a personal trainer, functional aging specialist, senior fitness specialist, brain health trainer, writer, and speaker.