Office Chair Sitting Posture Tips
The key points for using an office chair correctly include adjusting the seat height, maintaining the correct sitting posture angle, providing proper arm support, adjusting the screen viewing angle, ensuring feet are flat on the ground, and taking regular breaks to move around. Details are as follows:
Adjusting Seat Height: The seat height should be adjusted to fit your body, ensuring that your feet can rest flat on the ground. The angle between your thighs and lower legs should be between 95 and 100 degrees, or your thighs should be parallel to the ground with your knees bent at 90 degrees. If the chair is too high and your feet are left hanging, use a footrest for support. If the chair is too low, it will increase the pressure on your knees, potentially leading to joint pain or injury over time.
Sitting Posture Angle: Maintain a slightly reclined posture with an angle of about 100 to 110 degrees, allowing your entire back, especially your lower back, to fit snugly against the chair back. If the chair has a lumbar support, adjust it to the position that best supports the natural curve of your lumbar spine, which should maintain its natural forward convexity. You can add a lumbar support cushion or use a memory foam cushion on the chair back. The support should be placed between the third and fifth lumbar vertebrae, with a thickness that maintains a slight forward convexity of the waist, avoiding a hollow or overly convex waist.
Arm Support: Adjust the height of the armrests so that when your elbows hang naturally, your forearms can rest easily on the armrests or desktop, with the angle between your upper and lower arms close to 100 degrees. If the armrests are too high or too low, it can cause tension in your shoulder and neck muscles, potentially leading to frozen shoulder or cervical spondylosis over time.
Screen Viewing Angle: Elevate the monitor so that your line of sight is level with the top edge of the screen. The top of the computer screen should be at eye level or slightly lower by 10 - 15 centimeters, with a distance of 50 - 70 centimeters maintained. The center line of the screen should align with your nose to avoid long-term neck flexion or extension, which can lead to cervical lordosis. For those using multiple screens, place the main screen directly in front and arrange the auxiliary screens at a 30-degree angle to reduce neck rotation.
Feet Flat on the Ground: Your feet should be fully in contact with the ground, shoulder-width apart, avoiding crossing your legs or sitting with one leg over the other. Keep your ankles at a 90-degree angle to prevent impaired blood circulation in your lower limbs. If your height is insufficient and your feet are left hanging, use a footrest for support. Women wearing high heels are advised to keep a pair of flat shoes in the office for changing to avoid continuous tension in the Achilles tendon.
Regular Breaks: Stand up and move around for 1 - 2 minutes every 30 - 40 minutes. You can perform micro-movements such as cervical spine extension and scapular retraction. Intermittent activities like getting water or using the restroom can relieve static muscle load. During lunch breaks, you can stand against a wall or take a walk to promote nutrient exchange in the intervertebral discs and prevent lumbar disc herniation.
