Adjust Office Chair Tutorial

Here is the tutorial on adjusting an office chair:

1. Seat Height Adjustment Ensure that both feet are flat on the ground, with the thighs and lower legs forming an angle of 95°-100°. If the chair is too high and causes the feet to hang in the air, use a footrest. If the chair is too low and increases the pressure on the knee joints, raise the seat height. After adjustment, check whether the knees and hips are basically level to avoid anterior or posterior pelvic tilt.

2. Seating Angle Adjustment Lean back slightly so that the backrest and torso form an angle of 100°-110° to distribute the pressure on the lumbar spine. If the chair is equipped with a lumbar support, adjust it to the L3-L5 segments of the lumbar spine (the concave part of the waist) to ensure support for the natural physiological curvature of the lumbar spine. If there is no lumbar support, use a cushion to fill the gap at the waist.

3. Armrest Height Adjustment The armrests should be level with the elbows, with the upper arms and forearms forming an angle of about 100°. After adjustment, verify whether the forearms naturally rest on the armrests to avoid shrugging or having the arms hang in the air. If the armrests can slide back and forth, ensure they are aligned with the edge of the desk to reduce tension in the shoulder muscles.

4. Monitor Height Adjustment Raise the monitor so that the line of sight is level with the top edge of the screen to avoid looking down or up. If using dual monitors, place the main screen directly in front and tilt the secondary screen slightly to the side. You can place books or use a special stand at the bottom of the monitor to keep the neck in a neutral position.

5. Reclining Function Adjustment

   • Lever Adjustment System: Locate the lever under the seat, release the reclining lock, and lean back slowly. Adjust the lever to a comfortable angle and then lock it.
   • Knob Adjustment System: Turn the knob clockwise to increase the reclining resistance and counterclockwise to decrease it. Some chairs require an independent knob to set the reclining angle.
   • Pneumatic Adjustment System: Gently pull the pneumatic lever and slowly adjust the backrest angle to a comfortable position.

6. Reclining Angle Selection

   • When focusing on work: Keep the reclining angle ≤ 100° and maintain an upright torso.
   • When relaxing and thinking: Set the reclining angle between 100° and 110° to distribute the pressure on the lumbar spine.
   • When taking a short break: Set the reclining angle ≥ 110° and use a footrest to relax the whole body muscles.

7. Precautions

   • After adjustment, test the stability of the chair's center of gravity to avoid tipping over when reclining.
   • Avoid maintaining the same posture for a long time. Stretch the neck and shoulders every 30 minutes (such as turning the head slowly and shrugging to relax).
   • Regularly check whether the chair components (such as the gas cylinder and wheels) are loose to ensure safe use.