People always think that sitting is a rest, so "can sit and never stand." As everyone knows, for the lumbar spine, the pressure on the lumbar disc when sitting is much greater than standing, so there is a scientific basis for "standing and speaking without backache".
"Standing and not hurting" is a saying from the Qin dynasty and Shangyu stories of the pre-Qin Dynasty. Nowadays, it refers to other people who don’t have to be in the position to think about others but talks about it. It also means that people have the advantage of being cheap and selling. It is also a metaphor for a person. Understand the actual situation, just talk about the oral presentation, out of the actual, but also the analogy of low-handed, easy to understand. However, in patients with common diseases of the orthopedics, lumbar disc herniation, there is indeed a phenomenon of "standing and speaking without backache".
First look at the structure of the waist:
The spine is the pillar of the body. Due to the existence of four physiological curvatures, it is generally S-shaped. During the upright movement, various load stresses are concentrated in the lumbosacral section, so in this section especially L4 - L5, L5 - S1 It is prone to acute and chronic damage and degenerative changes. In the various components of the spine, the intervertebral disc degeneration is at the center of the lumbar and leg pain. The intervertebral disc is a fibrous connective tissue with stable connection, increased mobility and cushioning between the two vertebral bodies, from the cartilage plate, the annulus fibrosus, and the medulla. The nuclear consists of three parts. The lumbar intervertebral disc is the thickest, about 9mm for adults. There is no blood vessel inside the intervertebral disc. The blood supply comes from the periphery of the annulus, and the nutrients are supplied by infiltration. The nerve distribution of the intervertebral disc is similar to that of the blood vessel. Therefore, as the age increases, the intervertebral disc gradually degenerates, the water content decreases, the elasticity and the tension decrease, and the anti-loading ability is reduced. After the age of 20, the lumbar intervertebral disc will begin to undergo degenerative changes. This degeneration is a normal aging phenomenon. With the degeneration of the intervertebral disc, the elasticity and anti-load capacity of the intervertebral disc will also decrease with the effect of external force, which will easily cause the nucleus pulposus to protrude and induce lumbar disc herniation.
Structure-determining function: standing with the waist and the load is minimal!
The intervertebral disc is a fibrous connective tissue that exerts a stable connection between the two vertebral bodies, increases the mobility and cushions the shock. The pressure is related to the posture and weight of the body. The standing spinal load is calculated as 100%, and the sitting position is increased to 150%. The standing flexion position is 200%, and the sitting position is up to 270%. When sitting, the pressure in the disc associated with the squeezing effect is higher than when standing, because the pelvic plane is inclined backwards, the bone can move forward, and the lordosis of the physiology becomes kyphosis. When you sit in the position, you will increase the pressure of the disc. It can be seen that the pressure on the intervertebral disc is the smallest when standing, and the flexion pressure in the sitting position is nearly three times. At the same time, the squat squat and the fascia continue to be passively pulled for a long time, which is prone to strain and chronic inflammatory reaction. Poor local blood supply and accumulation of metabolites cause back pain. When the posture is changed, the passive traction of the muscle fascia of the lumbosacral region is relieved, and the passive traction state is changed to the voluntary contraction state, so that the local blood circulation is improved, the metabolites are absorbed and eliminated in time, and the pain is alleviated. ,disappear. Therefore, it is medically reasonable to say that "standing and speaking without backache". With the development of human civilization, physical labor has been greatly liberated, mental laborers have increased, fewer people have stood, and the number of people sitting and talking has gradually increased, and the number of people with back pain has also increased. Some occupations are also high-risk occupations of lumbar disc herniation. People who have been bending, standing, sedentary, etc. for a long time, such as computer editors, teachers, and porters, will cause the lumbar load to exceed the limit that they can withstand, resulting in lumbar spine. Different degrees of injury, induced lumbar disc herniation.
Sitting is also a university question!
It can be seen that lumbar disc degeneration is closely related to the activity and body posture of the spine. If the posture and activity habits can be properly adjusted, the spine degeneration can be slowed down and local symptoms can be improved. It is best to develop good habits and maintain normal posture early in the absence of symptoms. In the face of more and more indoor work, especially the majority of the work at the desk have experience of low back pain, or the lumbar disc has been prominent, there are symptoms of oppression, waiting for the opportunity to prepare for surgery. Just stepping on the job like this, younger, work harder, the money has not yet begun to earn the body to get in, so sometimes you have to stand up often, after all, standing and talking is not a pain! Even if you want to sit on the norm, you should choose the right seat at work, which is very important for your back. The main sign of the depth of the seat is that it is better for the body to sit on the back of the chair without touching the ground. The slope of the seat surface is preferably 5°-10°, and it is reported in the literature that the forward tilt is 5°, which can restrict the backward rotation of the pelvis and maintain the natural shape of the spine; the inclination of the backrest is generally 100°-110°. between. The shape of the backrest should be in line with the curve of the human body, because the backrest corresponding to the natural curvature of the spine is most suitable for the relaxation and rest of the spine. This can reduce the compression of the intervertebral disc by sitting position, but it takes about an hour to sit up and do some other work, so that all parts of the body can be coordinated and stretched to reduce the waist load.
Tips for alleviating symptoms:
If there is pain in the lower back and leg, regular treatment is required. It is necessary to go to the hospital to check the degree of spinal nerve compression, bed rest, reduce bending activities, and wear waist brace. It is best to stick to the hard bed and avoid it twice. Damage factor. Low back muscle exercise is also a better method for non-acute and asymptomatic prevention: five-point support, three-point support, arch bridge, Yan Fei, etc. can not only strengthen the strength of the back muscles, increase the stability of the lumbar spine, and avoid further lesions. Development can also relieve the pain in the back. It can also be massaged to relax the sacral spine muscles, reduce the pressure on the intervertebral disc, and reduce the stimulation of the nerve roots by the inflammatory response.
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