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There are many kinds of schoolbags for primary and middle school students, such as double shoulder bags, drawbars, schoolbags and so on. Although rod schoolbags can relieve the pressure on children’s shoulders, some schools forbid children to use rod schoolbags for safety reasons. So far, what we call student bag usually refers to the form of shoulder bag. But whether children can carry schoolbags correctly and protect their shoulders and bones is something that many people will overlook. So let’s go into the details of the right way for children to carry backpacks, which, of course, is equally effective for adults. Usually, we see children carry their backpacks this way, and over time, we mistake it for nothing. But this is the worst knapsack way we have to say. Reason 1, the principle of mechanics. First of all, from a mechanical point of view, the shoulder blade is the best point of force on the back, which is why many children carry heavy schoolbags, the body will bend forward, because this can transfer weight to the shoulder blades above. However, unreasonable backpack size and unreasonable way of carrying, will make the backpack center of gravity to the body of the gap increased, thus the body’s entire center of gravity backwards, resulting in instability of the body movement, more likely to cause falls or collisions. 2, the shoulder strap is loose. Secondly, the shoulder strap of the backpack is loose, causing the backpack to move downward as a whole, and part of the weight of the backpack is distributed directly to the lumbar spine, and importantly, the force is from the back forward. Because of the position of the spine and its natural bending direction, we know that pressing the lumbar spine backwards and forwards is more likely to cause spinal injury. 3, two shoulder straps are not the same length. Thirdly, because the shoulder strap of the backpack is loose, the children do not pay much attention to the length and length of the two shoulder straps, and the length and length of the shoulder straps is easy to cause

School bags are essential for children’s study, many parents in the purchase of school bags are often only consider the appearance and durability, and neglect the health care function. In fact, children’s schoolbags have a very big impact on physical development, such as the choice of improper easy to injure the spine, the formation of back, parents should pay more attention to the health problems brought about by schoolbags. So, how should we choose the right school bag? For this reason, experts from the shopping mall have offered reliable suggestions to parents. Look at the three belts, shoulder straps, waistbands and chest bands. Since most children’s schoolbags are heavy enough to block blood flow and cause muscle injuries, especially in the shoulders, it is generally recommended that the shoulder straps be wide enough to relieve the pressure on the shoulders and evenly distribute the weight of the schoolbags, while the shoulder straps with cushions can relieve the weight of the schoolbags. Strain on the trapezius muscle. In addition to wide shoulder straps, children’s schoolbags should also be equipped with belts and chest bands. Previous schoolbags usually did not have belts and bras, only some backpacks have, but in fact the role of increasing the two belts is very big, the use of belts and bras can make schoolbags closer to the back, the weight of the bag will be evenly unloaded on the waist and disc bone above, and can be fixed in the backpack, prevent the backpack from swaying Unstable, reduce the pressure on the spine and shoulders. Healthy bags should be light and smell free. Children’s schoolbags should be lightweight in material. Because children have to carry a large number of books and articles back to school every day, so in order to avoid the increase of children’s load, schoolbags should try to choose lightweight materials. It is generally recommended that the weight of children’s schoolbags should not exceed 15% of their weight. When purchasing schoolbags, we should also smell and read the smell of schoolbags. If there is a pungent smell, then it is likely that the