Slouching in an Office Chair

Slouching while sitting has numerous adverse effects on health, primarily impacting the spine and muscles.

Harm to the Spine

Slouching has a professional term called "sacral sitting posture." In this posture, almost the entire body's weight is placed on the sacrum. The sacrum is a triangular bone located at the base of the spine, connecting the spine to the pelvis. It is not designed to bear long-term direct pressure. When the body's weight is concentrated on the sacrum, the pelvis is prone to posterior tilt, and the lumbar spine loses its normal physiological curvature. In a normal sitting posture, the lumbar spine has a certain degree of lordosis, which helps disperse the body's weight and reduce pressure on the lumbar intervertebral discs. However, when slouching, the lumbar lordosis disappears, and there may even be a reverse curvature. Over time, this can affect the health of the entire spine. Maintaining this poor sitting posture for a long time can change the biomechanical structure of the spine, potentially leading to spinal deformities and triggering a series of spinal diseases.

Harm to the Muscles

Long-term slouching is also extremely unfriendly to the muscles. In this posture, the waist is in a suspended state. To resist gravity and maintain this position, the waist and surrounding muscles and ligaments have to exert force and remain tense for a long time. When muscles are in a contracted state for an extended period without sufficient rest and relaxation, they are overburdened, which can easily lead to lumbar muscle strain. Lumbar muscle strain can cause discomfort such as waist pain and soreness, affecting daily life and work. Moreover, studies have shown that the pressure on the lumbar intervertebral discs when slouching is 2 - 3 times that of a normal sitting posture. Maintaining this high-pressure state for a long time accelerates the degeneration of the lumbar intervertebral discs and can easily lead to lumbar disc herniation. A survey shows that among office workers who slouch for a long time, about 60% have varying degrees of lumbar problems, such as low back pain and lower limb numbness, seriously affecting their quality of life.