The Sitting Method of Office Chairs

The correct sitting method for office chairs should follow the following key points to ensure health and improve work efficiency:

1. Choose a stable and ergonomic chair
The chair should have a solid structure and a comfortable cushion to evenly distribute the pressure on the buttocks and avoid local pressure that can lead to poor blood circulation. Prioritize ergonomic chairs with adjustable features, designed to fit the natural curves of the neck, back, and waist, providing dynamic support and reducing fatigue from prolonged sitting.

2. Adjust the chair height to a reasonable range
Your feet should naturally rest on the ground with your knees bent at 90 to 110 degrees and your feet flat on the floor. If the chair is too high and your feet are dangling, use a footrest or lower the seat height with the gas lift. If the chair is too low, raise the seat or replace it with a higher desk-chair combination to maintain proper blood circulation in the lower limbs.

3. Optimize the arm support angle
When your arms are placed flat on the armrests or desk, your forearms should be parallel to the ground with your elbows bent at about 90 degrees. The height of the armrests should be level with the desk to avoid tension in the shoulders from raising your arms or shrugging. If the armrests are not adjustable, improve your posture by adjusting the desk height or using accessories like mouse pads.

4. Maintain the natural curvature of the spine
Keep your back straight and against the chair back to maintain the normal curvature of the lumbar spine (forward convex) and thoracic spine (backward convex). The chair back should provide lumbar support (such as an adjustable lumbar support) to prevent excessive forward or backward leaning of the lumbar spine. If the chair back lacks support, place a cushion between your waist and the chair back to fill the gap.

5. Change positions regularly to avoid static load
Get up and move every 30-45 minutes, relieving muscle tension through stretching, walking, or adjusting your sitting position (such as alternating between sitting upright, reclining, and standing). Prolonged static postures can accelerate spinal degeneration and increase the risk of herniated discs, while dynamic sitting can distribute pressure and promote blood circulation.

6. Choose sitting positions flexibly according to the scenario

• Upright sitting: Suitable for focused work, with your back against the chair back and your feet flat on the ground;
• Reclined sitting: Lean back about 110 degrees for short breaks to reduce lumbar spine pressure;
• Standing: Use a height-adjustable desk to alternate between standing and sitting to relieve lower limb swelling;
• Riding position: Adopt this when working in a forward-leaning position, with your knees slightly lower than your hips to reduce lumbar lordosis.

7. Make comprehensive adjustments based on environmental factors
Ensure the monitor height is at eye level, and the keyboard and mouse are placed where your elbows naturally hang down to reduce forward neck and shoulder extension. The lighting should be adequate and avoid screen glare to reduce the indirect impact of visual fatigue on sitting posture.

By scientifically adjusting office chairs and surrounding equipment, combined with active posture management, you can significantly reduce the risk of musculoskeletal diseases caused by prolonged sitting and improve long-term health.