How to Use an Office Chair

Proper use of an office chair involves adjustments in height, sitting posture, armrest positioning, screen height, and regular movement. Here are the specific steps:

1. Seat Height Adjustment
Seat height is a key factor affecting sitting comfort. Adjust the chair so that your feet are flat on the ground, with a 95°~100° angle between your thighs and lower legs. If the chair is too high and your feet are off the ground, use a footrest to fill the gap. If the chair is too low, your knees may experience fatigue or even injury from prolonged pressure. Some office chairs support pneumatic height adjustment; when adjusting, maintain a stable sitting posture and slowly press the lever to the desired height.

2. Sitting Posture and Lumbar Support
The correct sitting posture should involve a slight backward lean, with your back forming a 100°~110° angle with the chair back, allowing your lumbar spine to naturally fit the curve of the chair back. If the chair has a lumbar support, adjust it to the position of the 3rd to 5th lumbar vertebrae (the most concave part of your lower back) to avoid a gap. For chairs without lumbar support, roll up a towel or use a dedicated lumbar cushion to fill the space. Be careful not to lean too far forward or backward, as this can increase the burden on your spine.

3. Armrest Height Matching
The height of the armrests should match the position of your elbows when they hang naturally. The adjustment standard is that when your forearms are placed flat on the armrests or desk, your upper arms and forearms form an angle close to 100°. If the armrests are too high, your shoulders will hunch up; if they are too low, your elbows will hang in the air, causing shoulder and neck pain. Some high-end office chairs (such as the Sihoo S300) support forward, backward, left, right, and angle adjustments of the armrests, allowing flexible adaptation to different work scenarios (such as typing or reading).

4. Screen Height Optimization
The height of the monitor directly affects neck posture. It is recommended to elevate the screen so that your gaze is level with the top edge of the screen, avoiding neck strain from looking down or up. If using a laptop, pair it with a stand or an external monitor and use a Bluetooth keyboard to maintain an appropriate distance (about 50~70 centimeters).

5. Regular Movement and Stretching
Even with correct sitting posture, prolonged static sitting can lead to muscle stiffness. It is recommended to take short breaks every 30 minutes:

• Hip Stretch: Sit on the edge of the chair, spread your feet apart, cross one ankle over the opposite knee, and gently press your back forward to relax your gluteal muscles.
• Lower Back Release: Turn to the side, hold the chair back with your hand, and gently twist your body to relieve lumbar spine pressure.
• Shoulder Opener: Sit up straight, raise one arm over your head and lean to the opposite side, or hold the chair back with both hands behind you to stretch your shoulders.

Utilizing Special Features: Some office chairs (such as the Sihoo S300) have a headrest that is integrated with the chair back and can be adjusted forward and backward. Adjust it according to your height to the support point at the back of your head. The elasticity or angle adjustment function of the lumbar pillow can further accommodate different body types.

By making scientific adjustments and engaging in regular movement, you can significantly reduce the health risks associated with prolonged sitting and improve work efficiency and comfort.