Office Chair Backrest Too High
An excessively high backrest on an office chair can have various adverse effects, mainly including impacts on neck and waist health, as well as restricted mobility.
Impact on Neck Health
When the backrest of an office chair is too high, it restricts the normal range of motion of the neck. When seated, in order to obtain comfortable support, people often lean against the backrest. At this time, the neck will tilt backward excessively, which is not a natural posture for the human body. Maintaining this excessive backward tilt of the neck for a long time requires the neck muscles to continuously exert force to maintain the balance of the head, leading to neck muscle fatigue and soreness. Moreover, when the neck muscles are in a state of tension for an extended period, it can alter the normal physiological curvature of the cervical spine, increase the pressure on the intervertebral discs of the cervical spine, and thereby raise the risk of developing cervical spondylosis. For example, some office workers who use office chairs with excessively high backrests for long periods often experience neck stiffness and pain. In severe cases, they may even suffer from symptoms such as dizziness and numbness in the arms, which are likely manifestations of adverse effects on the cervical spine.
Impact on Waist Health
An excessively high backrest causes the body's center of gravity to shift backward, altering the normal mechanical structure of the sitting posture. In a normal sitting posture, the body's weight is evenly distributed over the buttocks and thighs, and the pressure on the waist is relatively small and reasonable. However, when the backrest is too high and causes the body's center of gravity to shift backward, the waist unconsciously thrusts forward to maintain the body's balance, resulting in the waist bearing unreasonable pressure. The long-term presence of this pressure can trigger waist muscle strain, leading to problems such as waist pain. Especially for people with pre-existing waist conditions, office chairs with excessively high backrests can further increase the burden on the waist and are not conducive to the recovery of the condition.
Impact on Mobility
In scenarios that require frequent getting up and moving around, an excessively high backrest can be an obstacle. For example, in an office where one needs to frequently communicate with colleagues or retrieve files from file cabinets, when getting up, the excessively high backrest may hit the back, limiting the range of body movements, affecting the speed and agility of getting up, and reducing work efficiency.
