Crossing one's legs crossing one's legs and ankles is also a bad sitting posture. Crossing one's legs for a long time will lead to poor blood flow, slow the speed of blood returning to the heart and brain, make the brain and heart unable to work normally, and easily lead to high blood pressure and heart disease. Cross placement will not only cause some pressure on the blood vessels of the lower leg, but also on the muscles, which will easily lead to different lengths of the lower limbs and varicose veins. It will also increase the pressure on the spine and back and deform the spine.
Sleeping on the desk Now, both students and office workers are used to taking a nap on the desk during lunch break to relieve fatigue. This posture will oppress many nerves in the body, and the eyeball will be oppressed by the arm, which will increase the intraocular pressure, gradually blur and damage the vision, and the degree of myopia will increase accordingly; The incidence of glaucoma will also increase greatly. The arm is pressed by the head, which will make the blood not circulate normally. Nerve conduction will also slow down, and there will be numbness and pain.
Beijing paralysis "Beijing paralysis" refers to the whole person sitting on a chair or sofa with his back suspended, which can make people feel relaxed for a short time. However, if Beijing is paralyzed for a long time, the waist has no endurance and the whole body's center of gravity shifts, it will easily cause spinal deformity and lumbar disc herniation for a long time. This posture is also very harmful to the cervical spine, because the strength of supporting the body is largely transferred to the skull and cervical spine, and it will also cause displacement pain of the cervical spine and lumbar spine for a long time.
For most people, it is difficult to maintain a straight and healthy posture, so they must exercise every half hour to promote blood circulation and relieve the pressure on the muscles of the back and legs.