In daily life, many people sit on chairs for most of the time. Even more than a day in bed, many people have a variety of stubborn diseases of cervical and lumbar spine. They are miserable and doctors do not have a good method. Preventing on weekdays is extremely important. Choosing a suitable chair plays an important role in prevention. What is ZHILI's understanding of the chair sitting in ? What kind of health chair ?
First, backrest need to pay attention
The backrest of a good chair is very elegant. In general, a backrest is not a necessary part of a chair. If a user has a large range of activities and wishes to be able to flexibly turn and pick up items, a chair without a backrest can be selected. When the user is working with the chair for a long time, the chair with backrest can make the user feel more comfortable. In general, the height of the backrest is not fixed, depending on the user's habits and feelings. For the work chair, as long as it does not affect the user's activities, the backrest height can only reach the user's first and second lumbar vertebrae. The taller person can go to the user's scapula and neck; however, for a casual chair, the length of the backrest is appropriate for the neck, so it is better to support the user's head and facilitate the rest of the user.
The inclination of the backrest is also learned. It increases with the increase of the rest of the user and the length of the backrest itself. It also has a relationship with the height, depth, and inclination of the sitting surface, and must also conform to the bending curve of the human spine. In general, the backrest tilt angle is gradually increased backwards, and the support point of the human body also gradually shifts upwards at the same time. Thus, the support point and the support angle increase from one to two. In general, the larger the angle between the backrest and the seat, the more comfortable the user feels when he rests.
Second, seat height, width need to be appropriate
A good chair should be designed so that the center of gravity of the user's upper body falls on the bones of the hips. The height of the seat is set based on the reference point of the person's sitting position (scalpel node). Generally, the height of the seat is 39 cm. Between -42cm, if the height of the seat is lower than 38cm, the user's knee will be arched, resulting in the generation of unpleasant sensations, and it will be more difficult for the user to get up; when the height of the seat is greater than 50cm When the user sits down, the user's body pressure will be dispersed to the thigh portion, causing the user's inner thigh to be compressed, which may cause the lower leg to swell.
The width of the seating surface must also be exactly the same, the seating surface is too narrow, and the user will feel uncomfortable because the muscles on both sides of the body will be squeezed; if the seating surface is too wide, the user's arms will surely When opened, the tendons of the user's latissimus dorsi and shoulder deltoids will be stretched. This will make the user feel tired when sitting for a long time.
Third, the chair is too soft and not good
The knowledge of the anatomy and physiology of the human body tells us that when sitting, the lumbar load on a person is larger than that on standing, and the position of the spine and pelvis should be perpendicular to each other. The vertical fixed position is maintained by the muscles on both sides of the spine. If the position of the spine and pelvis is shifted for a long time, the force of this system will be biased, which will easily lead to back muscle spasm and even bone damage. Over time, the user will feel back pain. In other words, bad posture can cause the user's spine, cervical spine and other bones to be damaged. A chair that is too soft can easily cause users to squat, unbalanced muscles and bones throughout the body, resulting in back pain. In this case, the user should consider replacing the chair and choose a harder chair for himself. If he continues to use the original chair, he should try to move the buttocks when he sits down, so that the back is close to the backrest of the chair instead of Floating, but also can consider adding a cushion to his waist as a support. At the same time remember that after a while, change your sitting position, exercise properly, stretch your limbs, and then continue to work.
Choosing a chair that meets ergonomic needs can make us sit more comfortably and live a healthier life. There are empty chairs that are not suitable for sedentary purposes, or are used for temporary rest and decoration. You should know something about what kind of chair you are sitting in. If you want to know more about furniture, pay more attention to the GO Home Information Channel.
