anticipate, adapt, and maintain a good quality of life for many more years.

1. Why sleep becomes fragmented after 70

One of the first changes most people notice is that they no longer sleep as they used to.
After 70, the brain produces less melatonin, the hormone that regulates deep sleep. In addition, the internal biological clock becomes more sensitive to light and noise.

This can cause:

Waking up several times during the night
Difficulty falling back asleep
Feeling tired even after spending many hours in bed

This is not