Sitting Sideways on an Office Chair

Sitting sideways on an office chair, whether it is an active choice of 'semi-reclined office work' or a passive result of a chair malfunction, can have adverse effects on the lumbar spine and other areas, requiring timely correction or repair.

If it is an active behavior of sitting sideways, such as 'semi-reclined office work', it can cause multiple harms to the lumbar spine. Firstly, when semi-reclined, the pelvis subtly tilts backward, and the natural lordosis of the lumbar spine is forcibly flattened. The weight of the upper body is no longer vertically transmitted through the intervertebral discs but becomes a downward pull, exerted on the back muscles and ligaments. This leads to the elongation and continuous tension of the erector spinae muscles, reduced blood flow, and the accumulation of metabolic waste between muscle fibers, causing soreness. Secondly, the pressure distribution in the intervertebral discs changes. One side is continuously compressed while the other side loses pressure entirely, leading to a sharp decline in nutrient exchange efficiency. The nucleus pulposus loses proper nutrient infiltration, and the intervertebral discs gradually become dry and brittle. Additionally, the small joint capsules on both sides at the back of the spine are rich in nerve endings and are extremely sensitive to traction. When semi-reclined and suspended, the inferior articular process of the upper vertebra and the superior articular process of the lower vertebra misalign and squeeze each other, constantly grinding the joint capsules, resulting in deep dull pain. Moreover, this type of injury can recur repeatedly, leading to a high incidence of chronic low back pain.

If the office chair itself has a tilting problem, such as due to a damaged gas lift, a faulty base, loose screws, or an uneven floor surface, causing it to lean to one side when sitting on it, corresponding checks and repairs can be carried out. First, check the floor flatness. Use rubber pads to elevate the shorter chair legs or use an angle grinder to grind down the longer chair legs. Alternatively, use adjustable feet to keep the chair level. Second, tighten all visible screws. If the screw holes are worn, use toothpicks or thin wooden sticks dipped in white glue to fill and reinforce them, preventing the screws from loosening and causing the chair to tilt. Third, deal with gas lift or hydraulic rod issues. If the gas lift or hydraulic rod is damaged, it can lead to abnormal height adjustment or tilting of the chair. Replace them if necessary to ensure the chair functions properly.