Why do we need a good chair, can't ordinary chairs sit in the same way?
Cheap chairs cost only tens of yuan, while ergonomic chairs cost hundreds to thousands of yuan. Why is it expensive?
The more comfortable a chair is, the more complex it is, and today we have a comprehensive understanding of ergonomic chairs;
From headrests, backrests, armrests, cushions, air columns, materials, and adjustment space, you can avoid detours and avoid stepping on thunder.
The problem of sitting posture
1. Wrong sitting posture
There are several common sitting postures in the office; either leaning back or leaning forward, and the angle is too large; at this time, the neck and waist are under great stress; if you often sit like this, you must be careful about your body.
2. What is a healthy sitting posture?
The thigh and upper body, that is, at the hip joint, should be maintained at or slightly greater than 90 degrees;
The thigh and calf, namely the knee joint, should be maintained at or slightly greater than 90 degrees;
The upper arm and lower arm, that is, at the elbow joint, should be maintained at or slightly greater than 90 degrees;
The upper body is slightly leaned back, and the waist is supported by a certain arc; the feet hang down naturally and are in contact with the ground without being suspended; the forearm just touches the tabletop.
However, if you sit in a standard sitting posture for a day, although the spine is fine, the muscles of the whole body can't stand it, and the back pain is all coming. Therefore, auxiliary objects, such as cushions, headrests, lumbar pillows, and engineering chairs, are needed to reduce muscle pressure. Relieve soreness. If you are working at a desk for a long time, you need a good chair to prevent occupational diseases from appearing early.
Why do you need an ergonomic chair?
Standing, sitting, and lying down are the more comfortable positions and the least stress on the spine?
not quite! Spine force posture ranking: sitting > standing > lying down!
There are four physiological curvatures of the spine in the standing state of the human body. The cervical and lumbar vertebrae are convex forward, and the thoracic and sacral vertebrae are convex backward. At this time, the force on the lumbar disc is the weight of the upper body, which is a normal force. When a person bows his head and bends down, the force is multiplied at this time; the posture with little force on the spine is lying flat, and the spine is in a stretched state.
The stress on the lumbar spine in the standard sitting posture is about 1.5 times that of the standing posture;
The force on the lumbar spine when lying at a desk is about 2 times that of standing;
The force on the lumbar spine when lying down is one-tenth that of standing, or less.
When sitting at the desk, the lumbar spine suddenly changes from anterior to posterior, that is, the normal S-shape becomes arched; the pressure on the lumbar intervertebral disc increases, the psoas muscle weakens, and various kinds of discomfort occur in the waist.
Who needs an ergonomic chair
1. Office workers who sit for a long time;
2. People who like to play computer games for a long time every day;
3. People with cervical and lumbar spine problems can be relieved but not treated;
4. Those who have higher requirements for chair comfort;
The engineering chair is a good choice, which can solve the above pain points...
Ergonomic chair purchase points
1 headrest
The headrest fits the cervical spine, reducing the pressure on the cervical spine and preventing neck pain. Everyone's height is different, and the headrest is adjustable to conform to the physiological curvature of the neck.
The height of the headrest is different when people lean forward and lean back, so the headrest should be wide and comfortable, and the height and angle are adjustable, and the support position is near the back of the head, which can support the cervical spine; the shape of the headrest should not be too flat , There must be an arc, so that it can fit the neck; at the same time, the headrest has damping adjustment, so that it will not be too loose or shake, and adapt to the head position.
Of course, headrests are not necessary; some foreign chairs have good backrests so that people can sit comfortably, but they do not have headrests.
2. Back
The closer the curvature of the chair back is to the natural curvature of the spine, the better the fit and the more comfortable sitting. The lumbar pillow should not be too protruding and should be in a curve. Otherwise, the waist will easily lead to an anterior pelvic tilt.
When leaning forward: automatically follow the lumbar spine, and the waist is supported;
When sitting upright: the lumbar pillow automatically changes the angle, so that the entire back can be balanced and supported comfortably;
When leaning back: the angle of the lumbar pillow changes, so that the entire back pressure is released to the support;
3 Cushion
The seat cushion also needs to have angle adjustment and fore and aft position adjustment.
When we use the computer, we will lean forward unconsciously, especially those who are short-sighted; a good chair can be tilted slightly backward through the angle of the cushion, so that your center of gravity will naturally fall back, naturally fit the back of the chair, and maintain normal Physiological curve of the spine. Another icing on the cake is the adjustment of the front and rear position of the seat cushion; the length of each person's thighs is different, those with short legs cannot rest on the back of the seat, so the seat cushion needs to be adjusted backward; those with long legs need to be adjusted forward.
A good ergonomic chair, the height and depth of the lumbar support are adjustable, and can just support the third or fourth position of the waist. The advantage of this is that the lumbar spine maintains a natural curvature, which is ergonomics. Engineering chairs under 500 yuan, although some have added lumbar support, can hardly play a supporting role.
If you weigh more than 170 pounds, you can consider choosing a sponge cushion;
In addition, there are nylon, fabric and other materials. If you have a fat body, you can choose sponge or nylon. Although the life span is shorter, it is more comfortable.
4. Armrest
Adjustable armrests can be used in various scenarios and reduce arm soreness.
The standard height of the table is generally about 75CM, and the armrest can be flush with the desktop. Adjusting the support too high will make you shrug your shoulders and cause neck and shoulder pain for a long time; it should also be able to be lowered so that the chair can be pushed under the table.
Purchase mistakes
Many professionals have cervical spondylosis, dizziness, numbness in the arms, and vomiting in severe cases, which are all caused by wrong sitting posture. I have also changed five or six chairs since I was a child, and the ones I have sat on are even more numerous. As small as wooden benches, bamboo chairs, and chairs worth tens of thousands of yuan; what kind of chairs are reasonably designed, there are still a few.
Sofa chairs have scattered force and low pressure, which can relax muscles, which is also the reason for sitting comfortably; but the sofa relaxes your muscles, but your skeletal machine, joints, and ligaments are under stress, but they are relatively insensitive. . Make your whole person curl up and become a C-shaped shape. Over time, the impact will be very large. Boiled frogs in warm water will subtly influence. Sofa chairs are comfortable but not healthy.
The office chair shown above is the Goodtone Butterfly series office chair. For more details, please click the blue word to enter the Butterfly product page to browse.
Post time: Nov-11-2022