insomnia in the traditional sense. It is a neurological change typical of this stage.

What helps

Getting natural sunlight in the morning
Avoiding bright screens at night
Keeping regular sleep schedules

2. When the body loses precision in regulating temperature

From age 70 onward, the system that regulates heat and cold becomes less efficient.
This means the body takes longer to adapt to temperature changes.

As a result, many older adults:

Feel cold when others do not
Overheat more easily
Sweat less, making it harder to cool down

This change