Computer sickness, also known as video display terminal syndrome, is caused by excessive computer use, unscientific computer placement and poor computer room environment. Computer disease” symptoms are mainly manifested as neurasthenia syndrome: dizziness, headache, fatigue, insomnia or nightmares, memory loss, depressed mood, etc.. Continuous operation of the computer should be within 4 hours, more than 1 hour of operation should be rested for 10 minutes. In addition, you should also frequently move your wrists, neck, etc. The muscles in these areas should be kept naturally relaxed, and the waist should be pressed against the back of the chair.
Causes
With the popularity of the Internet and computers, more and more people are using computers, and some people need to spend long hours with computers because of their work. The incidence of computer occupational disease is particularly prominent in these white-collar classes.
1. employees ignore the correct posture when using computers.
2, poor design of the office, such as keyboard placement is too high or too low, the mouse is not in the right position.
3, working too long hours, lack of rest, so that the body is too tired.
Hazards
A, sedentary will not move back pain
Sitting still, the muscles do not have the opportunity to stretch, and compression of nerves and blood vessels, whether sitting crooked or straight, long down will be back pain, resulting in repetitive mechanical motion injury. Many people are accustomed to sitting in front of the computer for a long time to work or play. Medical experts cautioned that excessive use of computers can cause adverse effects on people’s health.
Second, commonly used mouse will finger stiffness
Long-term use of computer keyboard and mouse, may be linked to a disease called carpal syndrome, the index finger or middle finger pain, numbness and thumb muscle weakness, the development may lead to nerve damage, and then cause hand muscle commission. The problem lies in the daily repetition of typing at the keyboard or moving the mouse, and the long-term, intensive, repetitive and excessive movement of the wrist joints, which leads to damage or compression of the peripheral nerves, so that nerve conduction is blocked, resulting in impaired sensation and movement of the palm of the hand. In addition, the elbow is often lower than the wrist, while the hand is raised high, the nerves and tendons are often compressed, the hand will start back a numbness, the fingers lose flexibility and often joint pain. Frequent finger force, but also the hand and related parts of the nerve, muscle damage due to excessive fatigue, resulting in ischemia and hypoxia and numbness and a series of a symptom. Three more by electromagnetic radiation will insomnia
Monitor heat is too high, there will be quite a lot of electromagnetic radiation at work, it will make the air ionization, and constantly generate positive charge (positive ions), and constantly neutralize the negative ions with the air, resulting in the content of negative ions is almost zero. Negative ions are more beneficial, positive ions are more harmful, long-term in the environment of too many positive ions, they enter the lungs through breathing, and then with the blood circulation is transported to various tissues of the human body, so that people’s blood, body fluids are acidic, slowing down the normal metabolic function of the body, so that toxins hoarded in the body, so that people insomnia, immunity, women may also endocrine disorders.
Relief methods
1, the upper body should keep the neck upright: make the head upright, so that the head is supported, both shoulders naturally down, the upper arms close to the body, elbows bent at 90 degrees, operating the keyboard or mouse, try to keep the wrist horizontal posture. Must choose an ergonomically designed desk and chair, use a special computer chair, sit on it to follow the “three right angles”: the computer desk under the west of the place to form the first right angle, thighs and back up is the second finger teaching, arms in the elbow joint to form the third right angle. Shoulder blades against the back of the chair, shoulders down, chin not close to the neck. Both eyes flat to the center of the computer screen, the seat is best to have a supportive back and armrests, and can adjust the height.
2, the computer’s placement height to be appropriate: the computer screen center position installed in the same level as the operator’s chest. Use the computer every hour should rest 5-10 minutes, do soft exercises or local massage. Try to avoid the upper limbs for a long time in a fixed, mechanical and frequent activities of the work state, use the mouse or typing, every hour of work should get up and move the limbs, do some fist, pinch fingers and other relaxing finger movements. When using the computer, the height of the keyboard and mouse on the computer desk, preferably lower than the elbow height when sitting, so as to help reduce the operation of the computer on the wrist tendon sheath and other parts of the injury.
3, when using the mouse, the arms do not hang: to reduce the pressure on the wrist, move the mouse do not use wrist force and try to rely on arm force to do, reduce the wrist by gift. Do not hit the keyboard and mouse keys too hard, easy and moderate force is good. The mouse is best to use the curvature, contact surface wide, help the force of dispersion. When using the mouse with the use of “mouse wrist pad” pad at the wrist. Wash your face can prevent radiation waves on the skin stimulation. Carefully clean up the office environment. Because positive ions back firmly adsorbed in the dust particles, the more dust, the more positive ions, the greater the impact of computer radiation on the human body. Drink more tea. Tea contains active substances such as tea polyphenols, which help absorb radioactive substances.
4, often drink green tea: the most popular health drinks. Because it contains a strong antioxidant catechol and vitamin C, not only can clear the body of free radicals, but also the paranephric cortex to secrete hormones to combat tension and stress, for emotional irritability has been greatly improved. However, it is best to drink during the day, one side affects sleep. Most of the radiation emitted from the monitor does not come from its front, but from the side and back. Therefore, do not put the back of your monitor against the back of your head or the side of your body at the same time. Placing a pot of plants or water under the computer desk can effectively absorb the electromagnetic waves released by the computer and reduce the adverse effects on human health.
Protective measures
A. Improve the working environment
1, back health care: office chair is best to choose a backrest, oil pressure and have a roller design. Chair with backrest, such as sitting too deep, can be added back cushion support lumbar back, so that the back to maintain a normal arc, reduce the pressure on the spine and muscles. The chair has a hydraulic design, you can adjust the height of the seat, so that the feet can be placed flat on the ground. The chair has a roller design, you can sit and adjust the body twist angle, so as to reduce lumbar strain injury. 2, mouse and keyboard: the height of the keyboard and mouse to moderate, the keyboard should be placed at a height of elbow flexion of about 80 to 100 degrees. The mouse should be placed at the same height as the keyboard, for people who are used to using the right hand, the mouse should be placed on the right side of the keyboard. Long time use of the keyboard and mouse, easy to induce tenosynovitis, this time can be added to the keyboard before the wrist pad or towel homemade wrist pad, so as to support the wrist and reduce the height of the wrist up. The mouse position can also be used to make a towel pad.
3, computer screen: the screen should be tuned to tilt upward about 15 degrees, after sitting, the first line on the screen with the eyes into a horizontal angle. The screen should not face the window, at least 90 degree angle with the window to reduce the refraction of sunlight. Add a filter to the screen to reduce radiation and static electricity. In order to make the line of sight and screen balance, to avoid the head often hanging and repetitive movements of the neck, you can add a folder, but note that the folder should be able to change position at will, in order to avoid the head twisted to one side for a long time, causing muscle overwork. Having a good computer does not mean that you are isolated from neck and shoulder pain. Bad habits of using computer may bring pain as well. Develop good habits to keep away from pain: every hour you use the computer, you should rest for 5 to 10 minutes, do soft exercises or local massage, and develop regular exercise habits, stretching and muscle training for the shoulders and neck, upper limbs to increase flexibility and muscle strength.
4. Exercise to relax the neck and shoulders: when flying a kite, raising the chest and head, looking left and right can keep the muscle tension of the cervical vertebrae and spine, keep the elasticity of the ligaments and the flexibility of the vertebral joints, which is conducive to enhancing the bone metabolism and the compensatory function of the cervical vertebrae and spine, without damaging the vertebrae and preventing the degeneration of the vertebrae and ligaments, which is really a good party left by the old ancestors to prevent cervical spondylosis. Swimming: Because the head is always raised upward when swimming, the neck muscles and lumbar muscles are exercised, and there is no burden on people in the water, and it does not cause any damage to the intervertebral discs, which is considered a more pleasant way to exercise the cervical spine.
Second, adhere to do health care exercise
The following health care exercise is introduced daily in the morning and afternoon to do, 1 to 2 times each in the morning and afternoon.
1, neck relaxation exercise: people sit down, look in front of the eyes, head forward, head to the left and right rotation, large amplitude but slow action, do not circle, stop 4 seconds, repeat 8 to 10 times. Head up, look to the ceiling, then, chin down, close to the heart, hold for 4 seconds, repeat 8 to 10 times.
2, waist bone: hands on the back or sides of the chair, the upper body straight back, do the upper body backward, do 10 to 15 times, so that the waist is not easy to tight hard.
3.Hold knees: sitting, feet flat, left and right knees in turn, stop 4 seconds, do 10-15 times for each foot.
4, foot exercise: can make the foot muscle blood circulation. People sit down, feet flat, toes down hard stir up both ankles, stop 4 seconds, and then put down; then the foot plate for support, do toes upward action, stop 4 seconds, repeat 10 to 15 times.
5, wrist movement: left and right hand to do, the left hand will be the right hand fingers and wrist pull back, and then slowly straighten the elbow, until the front of the wrist feel tightened, hold for 4 seconds, each hand to do 8 to 10 times