Does the child do not sleep at 9 o'clock in the evening, will it affect growth and development?

Many parents have heard that when 9 to 11 pm is the secretion of growth and development hormones in the human body. If the baby sleeps too late, it will miss the secretion of long -developed hormones, which will lead to long -term development.

In the backstage of Lilac Mom, I often see many parents' messages, and I am very worried that the baby is sleeping too late and affects development:

What is the secretion of growth hormones?

Do you miss the secretion of growth hormone at night and affect development?

Today, I would like to ask Teacher Zhu Xiaojie, a sleeping consultant to talk to us ~

Sleeping at night, it will really let the baby

Do you miss the peak period of growth hormone secretion?

Image source: station Cool Hirolo

Let me send you a reassinual pill -not to miss the peak period of growth hormone secretion at night.

First of all, no fixed sleep time can be defined as late.

We usually think that sleeping late is just a relative concept. We need to consider the age of the baby's age and during the day. Generally speaking, for infants and young children of different ages, the night sleeping time is concentrated in these several time periods:

Babies within the age of age are often between 18: 30 ～ 20: 30

Children aged 1 to 2 are common between 19: 30 ～ 21: 00

Children aged 2 to 3 are common between 20: 00 ～ 21: 30

If the baby sleeps at night and the common time period of his lunar age later, we will think that the child belongs to sleeping late.

Secondly, growth hormones are not secreted at a certain fixed time.

The growth hormone will be periodic pulse secretion within 24 hours throughout the day. The pulse secretion means that it will increase in a short time and then return to the normal secretion level.

A large amount of evidence shows that its secretion period is closely related to deep sleep stages [1].

Deep sleep will begin to appear after we go to sleep, and scientific researchers have evaluated whether they are deep sleeping through the intensity of Beta brain waves.

The following figure 1 shows the change of the Beta brain wave (that is, deep sleep phase) after falling asleep; Figure 2 represents the change of the secretion rate of growth hormone after falling asleep.

Picture source: reference literature

After the comparison, is it discovered: the peak period of the secretion of growth hormones basically appeared synchronized with deep sleep? That's right.

Not only that, the study also found that there is also obvious linear relationship between the duration of sleep and the secretion of growth hormone. That is to say, the longer the duration of deep sleep, the more the amount of growth hormone secretion is obtained.

There is also a significant linear relationship between the duration of deep sleep and the secretion of growth hormone secretion

Picture source: reference [1]

Another foreign research evidence has further proved that the peak period of growth hormone secretion has nothing to do with clocks -

When the sleeping time of participating in the experiment was advanced or delayed for 3 hours, the time when the peak period of the growth of hormone secretion appeared in advance or delay for 3 hours [2].

All in all, the secretion time and intensity of growth hormones are not closely linked to sleeping time, and sleeping itself will not affect the secretion of growth hormones.

Parents do not have to worry too much about sleeping and affecting growth and development. As long as the baby sleeps well, even if he sleeps late than someone else's children, then the growth hormone in his body is just a little later than others.

How do you know if your baby sleeps well?

All of our sleep arrangements are to allow the baby to get a good sleep quality. The three conditions for judging whether the quality of sleep is good is: sleep duration, continuity of sleep, and emotional state during the day.

Sleeping

Picture source: Lilac Mom

It can be seen from the table that as the babies grew up, their demand for a nap during the day continued to decrease, but sleeping at night has been in a relatively stable range, about 10-11 hours.

Babies with insufficient sleep at night are more prone to long -term overall sleep.

Especially for babies who are sleeping late, parents need to pay attention to whether the baby is going to sleep late and get up late.

If your baby goes up early and gets up early, and the time of sleeping during the day, the overall sleep volume is obviously small, then it is unhealthy to continue to let your baby sleep late.

(PS. If you want to observe the baby's sleeping late and sleeping time in detail, you can download the Dingxiang Mom APP. The mother -in -law mother and more than 10 professional doctors will be available on online feeding records to help novice parents quickly understand the baby's sleep law and improve the night at night. Wake up, sleep short, etc., scan the picture below the QR code below, let's experience it ~)

Picture source: Lilac Mom app

Sleep continuity

If the baby wakes up at night at night, and it is difficult to fall asleep again at night, for example, it takes a long time, a long time, and even the milk does not sleep, and wakes up. Then the baby's sleep at night will be affected.

However, parents need to understand that continuous sleep does not mean that the child is motionless during the sleeping process. After the baby enters sleep, it will occur various movements, such as turning over, hum, etc. This is normal.

At the same time, the baby will go through the short -term sober during the five or six cycle conversion during a whole night. This is also unavoidable. As long as the baby can sleep smoothly, it is no problem.

Emotional state of the day

Although there are individual differences in the sleep needs of each child, as long as the baby is lacking in sleep, their emotional state will be affected during the day. Three Tips for improving your baby's sleep quality

Regulatory

Many babies' sleep problems are actually caused by irregular schedules. There is no regular schedule, which will allow parents to lack confidence in the arrangement of sleeping babies, leading to missing the best time to fall asleep.

Bedtime

Jodi, a famous American sleeping expert, and her team, have done comparison experiments for 405 mothers and their babies for three weeks.

The experiment found that only the link of fixed sleeping procedures can be increased, and the baby's sleep delay can be significantly improved, the number of night wake -ups and duration can be reduced, and sleep continuity is increased [3].

Add a fixed sleeping program to improve sleep, and you can see changes in three days. [4].

Image source: station Cool Hirolo

Develop baby's sleep ability

As long as there is proper support, sleeping well is a ability to be developed. Replaceing high -intensity soothing methods with low -intensity soothing is a strategy we often use.

For example, the baby still has the strongest sleep dependence at present -when you do not milk or sleep, you can wake up when you remove the milk: you can consider using a campaign to replace the milk sleep, sleep from your arms to sleep, from sleeping with you to yourself to yourself sleep.

references

[1] Cauter. E.V., Et Al. Interrelationships Between Growth Hormone and Sleep, Growth Hormone Igf Research. 2000; 10 (2): S57-S62

[2] Takahashi, Y., Et Al. Growth Hormone Secretion During Sleep, J CLIN Invest. 1968; 47 (9): 2079-2090.

[3] Mindell, Jodi A et al. A nightly bedtime routine: impact on sleep in young children and maternal mood. Sleep. 2009; 32(5): 599-606

[4] Mindell, JODI A ET Al. Implementation of a Nightly Bedtime Routine: How Quickly Do Things Improve ?. Infant Behavior Development. 2017; 49: 220-227

Experts in this article

Zhu Xiaojie

Cooperative expert

IMPI Maternal and Child Sleep Council

Zhang Xiaoyu

Review expert

American FSI Certification Infant Sleep Counselor

Ancient gold

Review expert

New Zealand BSC certification sleep consultant

Plan

Planning: Ai Tongmu

Produced: Hercules

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