Age and sleep

  •  April 10, 2020


Babies sleep all day. Young people sleep a lot. But it's hard when we get seven hours straight in bed. Science explains why it becomes more difficult to achieve deep sleep as we get older.

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We all need to sleep well.


In addition to its invigorating function, quality sleep helps keep extra weight off.

During sleep, our body produces leptin, a hormone that can control the feeling of satiety.

Without this, we over-calorie consumption during the day because the body is not satisfied.


But why, over the years, are we destined to have trouble sleeping right?

In adulthood, for various reasons, we no longer sleep “at one stroke”.

As a result, we are always sleepy upon waking.


And if we sleep less “solid”, sleep is never deep enough.

The more birthdays, the less time the brain rests.

A typical brain at age 25 plunges into deep sleep several times a night.

Quite different from a 70-year-old brain that goes in and out of a moderate level of sleep, spending a few minutes a night in the deepest phase.

The transition between sleep and wakefulness is also more abrupt as we get older.

Hence comes the term that calls this phase "light sleep."

But is there no solution?

The answer is naps.

Normally, naps do not allow us to achieve deep sleep.

But they help compensate for decreased alertness and increased stress, which may come from poor rest.

Science Explains How Much Sleep You Need Depending on Your Age (April 2020)


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