Learn the table, eye protection lights, learn the concept of high -priced tube or speculation?

With the improvement of living standards, parents' requirements for their children's learning utensils are also getting higher and higher. Children's learning plans with "special functions" have been favored by parents. These studies are labeled with "ergonomic science", while others advertise themselves "can simulate natural light" ... With these scientific concepts "surrounding", their value has also doubled. But are these learning utensils worthwhile?

It's September, and some parents are busy setting up learning equipment for children who are about to enter. With the improvement of living standards, parents' requirements for their children's learning utensils are also getting higher and higher. Children's learning plans with "special functions" have been favored by parents. These studies are labeled with "ergonomic science", while others advertise themselves "can simulate natural light" ... With these scientific concepts "surrounding", their value has also doubled.

So, are these expensive learning utensils worthwhile or the concept of hype? In this regard, a reporter from the Science and Technology Daily interviewed relevant experts to answer questions for parents.

Children's learning table and chair: publicity effect may be greater than actual use effect

Open the major e -commerce platform websites and search for "children's learning tables and chairs". The related products are full, and the price ranges from thousands of yuan or even tens of thousands of yuan. Some merchants have claimed that their products are "in line with ergonomics", "can correct bad sitting positions, alleviate visual fatigue, and prevent spinal bending."

So, do children learn tables and chairs really have these functions?

In this regard, Zhu Rusen, director of the spine surgery of Tianjin People's Hospital, introduced in an interview with the Science and Technology Daily reporter that children's tables and chairs are a kind of household product. As the name suggests, it is a table and chair designed for children. The height of ordinary desks is designed at the average height of the country, generally 75 cm.

"Using a table designed according to adult standards, children need to sit on a high chair to reach it. This will cause their feet to be empty, which may cause the child to sit in a bad posture. At the same time, it will reduce learning efficiency. "Zhu Rusen said that the correct sitting posture of children is to step on the ground with both feet flat, the calf is vertical and the ground, and the thigh and the ground level. If you want to sit right, you really need a set of tables and chairs suitable for children, but you don't have to buy "sky -high" children to learn tables and chairs.

Zhu Ruson believes that the main function of children's learning tables and chairs is to adjust the height of the table and chair according to children's height. As for the functions of preventing myopia and correcting sitting positions claimed by some products, the propaganda effect is greater than the actual use effect.

"At the peak of growth and development, children can be about 10 cm in a year. The height of the table and chair twice a year can fully meet the needs. Therefore, manual adjustment is not troublesome. Chair. "Zhu Rusen suggested that when the specific adjustment can be adjusted, according to the height of the child, at the same time, it can be compared with the size table of the desk and chair of the primary and secondary school (GB/T 3976-2014).

In addition, children are at the peak of growth and development, and they do not need the support of the shoulders, neck and waist like an adult, as long as the chair is straight and has a certain support. "Therefore, some high -priced children's learning tables and chairs are equipped with a very high -end back. In fact, children don't need it." Zhu Rusen added.

"As for the correction of the sitting posture, parents don't think that buying a set of high -priced children to learn tables and chairs for children is good." Zhu Rusen introduced that the height difference between the table and the chair is called the height difference between the table and chair, and the height difference between the table and chair height. It is the most factor that affects the sitting position. For primary school students, the suitable table and chair height difference is 1/3 of the height of them (at the height of sitting in the sitting position), so the height of the elementary school student's table = chair height +1/3 sitting height; for middle school students, the height of the table should be height should be Based on this, increased by 1 to 2.5 cm.

If the table and chair at home cannot be adjusted manually, you can also change the tables and chairs regularly according to the child's high and the height difference between the table and chair. "Even if you buy a relatively economical table and chairs, as long as you adjust it to a suitable height, parents often remind their children to help them develop a good habit of combining labor and rest, and they can effectively correct bad sitting positions." Zhu Rusen said.

Spine library: just fine -tuned the carrying system

Schoolbags are an important learning tool for students to study. Now that they have opened major e -commerce platforms, you will find that the schoolbags seem to have "evolved" for several generations. Today's schoolbags are not only diverse but many functions, especially schoolbags with spine -protection functions, which are priced at a maximum of thousands of yuan.

Zhu Rusen said that the spine schoolbag is actually fine -tuned for the carrying system of the schoolbag, and then commercialized packaging, thereby increasing the price of the product.

If a schoolbag is decomposed from the structure, it can be divided into two parts: the first part is the part of contact with the body, which is called the carrying system; the second part is the part of the part, which is called the tolerance system.

At present, the main difference between schoolbags on the market is the first part. Some manufacturers have improved the carrying system of schoolbags, which in turn has generated conceptual products such as lightweight schoolbags, spine schoolbags, and health schoolbags.

"In fact, to protect the spine, it is not necessary to buy very expensive spine schoolbags." Zhu Rusen said that when choosing a schoolbag for their children, if parents pay attention to the following points, they can also achieve the purpose of protecting children's spine.

First of all, the schoolbag should be controlled from 0.5 to 1 kg, and its weight cannot exceed 10%of the child's weight. Excessive schoolbags may cause children's spine position to change to adapt to load. In addition, the too heavy schoolbag can also cause the human body's center of gravity to be unstable, increase the pressure of the arch, and increase the pressure on the ground. Secondly, there are many styles of the schoolbags, such as back, shoulders, hand -hand, etc., and backpacks are more in line with ergonomics. Shoulder schoolbags often make children unconsciously raising their shoulders to stabilize the strap, which can easily cause back muscles to cause back pain for a long time. The shoulder bag has been back for a long time, and the unilateral body load increases. Such asymmetric stress will affect muscles, spine and bones, lead to spinal bending, and then affect children's growth and development. It is best to choose the shoulder bandwidth. With the weight of the schoolbags, the wider the shoulder strap, the more you can disperse the weight of the schoolbag and reduce the pressure of the shoulder. When the child endings, try to put the schoolbag straps long and maintain the focus of the schoolbag on the waist. It is recommended to choose a schoolbag with auxiliary belt and chest strap to reduce the distance between the schoolbag and the back.

Third, the size of the schoolbag should be appropriate. Children of different ages are suitable for schoolbags of different sizes. The area of ​​the schoolbags fit the area of ​​the child's back should not exceed 3/4 of the total area of ​​the back to prevent the "bag not called".

Finally, the back and bottom of the schoolbag must have support functions. The support can help the child to reduce the burden, so that the child will feel easy to carry, and it can also protect the back.

"When buying schoolbags, parents should not only have price theory. It is most important to buy suitable schoolbags according to the needs of children." Zhu Rusen suggested.

Full spectral lighting: difficult to generate the same illness as natural light

Scientifically proves that outdoor light is the key to preventing myopia. Children and adolescents can effectively prevent myopia for 2 hours per day. So, does the full spectrometer lamp that claims to be "the most recently connected to light, can simulate natural light, and prevent myopia" also has this effect?

"Actually, the full spectrum lights only use the concept of sunlight to simulate the full band spectrum of sunlight 380 to 760 nanometer, and the energy, illumination and changes of sunlight are unimulated." Tianjin Ophthalmology Hospital Li Lihua, director of the Vision Center, introduced in an interview with the Science and Technology Daily reporter.

"The reason why outdoor light can prevent myopia is because the beneficial blue light in sunlight can stimulate the eyes to secrete more dopamine, dopamine to protect vision, regulate biological rhythm, and help identify colors. It can reach 10000lux (Lax), and even in the shade of the tree, it can reach 1000LUX's light intensity. "Li Lihua said that high -energy beneficial blue light irradiation is the key to preventing myopia. At present The spectrum has blue light, and the light intensity is not enough to prevent myopia.

Except for the full spectral lights, almost all of the watch lamps on the market claim that "no flash, no radiation, no glare" can effectively prevent myopia.

In this regard, Li Lihua said that the main goal of "non -frequent flashing, radiation without radiation, no glare" is to alleviate visual fatigue during reading, and visual fatigue will indeed cause myopia. Well, it cannot be said that as long as the table lamp that can alleviate visual fatigue can be used to prevent the occurrence of myopia.

"Examine whether the light source of the child's learning environment is qualified, you can start from two aspects. First, see if the light source meets the standard, and take the table lamp as an example. Click, then even if this light source meets the standard. "Li Lihua introduced that the second is to see if the learning environment has the overall light source and local light source. Generally speaking, the overall light source is the main lamp in the room, and the local light source is the desk lamp on the desk. At the same time, the table lamp should be placed on the side of the child's main hand.

In addition, pay attention, do not place the desk in the place where the sunlight can be shot directly by the window. Do not let the strong sunlight directly illuminate the child's eyes. The illuminance of the table lamp is appropriate for 350 to 500lux. At the same time, do not buy the desk on the white piano lacquer table, otherwise it will be easy to reflect and stimulate the child's eyes.

"Parents want to judge whether the light conditions in the home have reached the standard. There are several simple methods." Li Lihua introduced that he could stare at the light for 20 seconds, and then go to the wall. If you "see" the light spots with lights on the wall, It means that the brightness of the lights is too strong. If there is a light source lighting, it is necessary to get close to the readers to see the words, it means that the room light is too dark.

Source: Science and Technology Daily

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