Usage of Office Chairs

The usage of office chairs includes two aspects: the use of adjustment functions and healthy usage suggestions, as detailed below:

I. Use of Adjustment Functions

1. Armrest Adjustment

   • Most office chair armrests support vertical movement, and some can rotate 360 degrees. To adjust, press the button on the side of the armrest (if available) or apply direct force to move it to a position where the forearm can rest comfortably when the elbow hangs naturally, ensuring the angle between the upper arm and forearm is close to 100 degrees.
   • If the armrests obstruct the knees from sliding under the desk, lower or remove them.

2. Seat Height Adjustment

   • Locate the control mechanism at the lower part of the chair or on the armrests (such as a lever, knob, or pneumatic pump lever).
   • Sitting Adjustment: Pull up the control lever until both feet are flat on the ground, with the thighs and calves forming a 95-100 degree angle; if this cannot be done from a sitting position, adjust while standing so that the front of the chair is below the knees.
   • Scene Adaptation: When working on a computer, keep your eyes level with the monitor (if the monitor height is not adjustable, adjust the seat height); when working at a desk, keep your elbows level with the desk; when sitting for long periods, ensure both feet are flat on the floor.

3. Sitting Angle Adjustment

   • Recline slightly to 100-110 degrees, allowing the back (especially the lower back) to fit snugly against the chair back. If the chair is equipped with a lumbar support, adjust it to support the natural curve of the lumbar spine.

4. Seat Tilt Adjustment

   • Locate the lever at the front of the chair base. Adjusting it up or down raises or lowers the front of the seat to accommodate different leg lengths or work requirements.

5. Chair Back Adjustment

   • Push the lever at the back of the chair base to control the forward or backward tilt of the chair back, finding a comfortable angle for back support.

6. Chair Rotation

   • Sit on the chair and twist the base with both hands (if the chair base has rotatable parts) to rotate left or right, facilitating object retrieval or communication.

II. Healthy Usage Suggestions

1. Monitor Height Adaptation: Elevate the monitor so that your eyes are level with the top edge of the screen, reducing neck strain.
2. Regular Movement: Take a simple stretch every 30 minutes, such as hip stretches (sitting on the edge of the chair, feet apart, crossing ankles and leaning forward), lower back release (twisting sideways while holding the chair back), and shoulder opening exercises (raising arms or holding the chair back with both hands behind you).
3. Use of Auxiliary Tools: If the chair is too high, use a footrest; if the chair has no footrest and your feet are dangling, readjust the height.
4. Sitting Posture Changes: Change your sitting posture every 15-30 minutes (such as leaning forward, reclining, or sitting sideways) to avoid localized muscle fatigue.