It is estimated that many people have had this experience when they were young, that every time they sit in a chair to do homework, they are always reminded by their parents:Sit straight and straighten your chest. If one accidentally arches their waist, their parents will scold them harshly, and many people will be beaten and scolded by adults due to this

It is estimated that many people have had this experience when they were young, that every time they sit in a chair to do homework, they are always reminded by their parents:Sit straight and straighten your chest. If one accidentally arches their waist, their parents will scold them harshly, and many people will be beaten and scolded by adults due to this. Another thing is that when a teacher says the word 'sit well' in class, as a student, I can't help but straighten my back.

Due to the "education" from childhood to adulthood[Back straight] has become the simplest and most correct command for sitting postureIt has become the most common synonym for protecting the lumbar spine. This concept has been deeply ingrained in people's minds until they grow up, to the extent that many people still make such demands even after having children.

But to people's surprise, in fact,The sitting posture of 'straight back' is not entirely correctPeople have always been in a misconception. In fact, upon closer examination, many people may find that the longer they maintain a sitting posture with a straight back, the harder it is to persist in the back, and the more tired and uncomfortable their bodies become. SometimesLong term maintenanceA sitting posture with a straight back and possiblyCan cause certain damage to the lumbar spine. So, what's going on here? Is the "health concept" that people have long upheld wrong? What's wrong with having a straight back?

Is "straight back" the correct sitting posture?

Before discussing this issue, we first need to understand the anatomical structure of the human spine, which is composed of 24 vertebrae, including7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, 1 sacrum, and 1 coccyx. These vertebrae are composed ofIntervertebral discs, muscles, ligamentsThey are interconnected and form four physiological bends: the neck, chest, waist, and sacrum,The cervical and lumbar curves protrude forward, while the thoracic and sacral curves protrude backwardUnder normal circumstances, a similar pattern is formed'S' curveThe shape of the.

The spine is crucial to the human body, as it is not only distributed to control bodily movementsNerves and blood vesselsWait, more importantly, it is equivalent to a "load-bearing beam". As we all know, load-bearing beams are the foundation of a house, and if they are knocked down, the entire house will collapse. And the same goes for the spine. If there is an injury, it is equivalent to losing itThe Fundamentals of Human Beings.

.Various joints and parts of the bodyWhen the forces are relatively average, it is possible to avoid certain parts bearing excessive weight, which is the most labor-saving position for the body. In medicine, this position is calledNeutral position.

Experts have conducted relevant research and found that ifNeutral position100%So whenBack and knee level at 90 degreesWhen sitting in a corner position, the pressure on the lumbar spine increases to140%Slightly tilt back.Body tilt forward.

And what we commonly refer to as "straight back and waist" is an upright sitting posture, which means that when the knees and back are at 90 degrees, the pressure on the lumbar spine is as high as 140%, and both front and back of the waist areWithout specific support pointsSitting in this position for a long time willChanging the normal physiological curvature of the lumbar spine.

In addition, when the waist and back are straight, almost all of the weight of the upper body will fall onIschial tuberosity of the pelvis..

The following hazards may all be caused by "straight back"

Maintain a "straight back" sitting posture, and before you understand its drawbacks, you may feel that this isHealthy sitting postureIn fact, it may invisibly harm your body, which is invisible to the naked eye. However, after a long period of accumulationShow it in a painful way..

Lumbar disc herniation

Lumbar disc herniationlumbagoLumbar disc herniation.Lumbar disc herniation.

This is because when the human body straightens its back,The pressure between the various vertebrae of the bodyCompared to other sitting positions, it will be larger, and the abnormal load bearing of the lumbar spine can cause lumbar disc degeneration, leading toRupture of fibrous ring in intervertebral discThe nucleus pulposus tissue inside will be removed from the rupture siteProtrusion (or protrusion) in the posterior or spinal canal, so as to stimulate or compress the Spinal nerve root, which will lead to abnormal nerve function in the long run, and produce different degrees oflumbago.

Lumbar muscle injury

Lumbar muscle injuryLumbar muscle injury.

...

The doctor tells you what is the correct sitting posture

.Buy tables and chairs with adjustable height.

..Place your legs in a forward and open position.Spinal arch..Easy to cause low back pain.

So, the next thing to talk about is the correct sitting posture:

Slightly tilt back

Body tilt forwardSlightly tilt backMake it in a comfortable position for oneself, after all, the waist is the first area that needs support, usuallyTry to lean your waist against the back of the chair as much as possible..

Shoulders straight

Shoulders straightShoulders straightThe stress on the bones and muscles on both sides of the spine is uniform.Shoulders straight.

Legs bent at 70 degrees

The last thing to talk about is the position of the legs, which is also very important. Perhaps many people have this experience, which is that when sitting in a position, if the legs maintain a movement for a long time, it will feel very uncomfortable, and thenContinuously changing the position of both legsIn fact, there is also a certain emphasis on the placement of the legs, and many positions are not qualified, especially those that many people likeCross one's legsThis is actuallyThe most harmful to the body.

The correct sitting posture is to naturally bend both legs at a 70 degree angle, which will minimize the weight brought by the upper body, thereby reducing the load on the spine, and the body will naturally be in a comparative positionA smooth and relaxed state.

Write at the end

The correct sitting posture is not only beneficial to physical health, but also reflects a person's internal image, adding points to your image. Therefore, quickly change your bad sitting posture!

References:

[1] Huang Ying. Life moves should prevent spine injury [J]. Family medicine: the first half of the month, 2016 (2): 1

[2] Zhang Zhao. Which sitting posture harms the spine the most [J]. Medical Diet and Health Care, 2013 (2): 1

[3] Liu Yiren, Li Li. Improper sitting posture can damage the spine [J]. Construction Worker, 2014,35 (12): 1

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