Office Chair Usage

The correct usage of an office chair includes aspects such as seat height, sitting posture angle, armrest height, monitor height adjustment, activities after prolonged sitting, and the use of special functions of executive chairs.

1. Seat Height Adjustment: When adjusting the seat height, ensure that your feet can rest flat on the ground, with the angle between your thighs and calves maintained at 95 to 100 degrees, distributing your body weight evenly. If the chair is too high and your feet are left hanging, use a footrest; a chair that is too low will increase pressure on your knee joints. For chairs with height adjustment functions, such as executive chairs, the right lever controls the height. While seated, gently lift the chair upwards to raise it and press downwards to lower it. When adjusting the height, do not lift your buttocks off the seat; let your body weight assist in the adjustment until your knees are bent at 90 degrees and your feet can rest flat on the ground for maximum comfort.
2. Sitting Posture Angle Adjustment: Lean back slightly, with an angle of approximately 100 to 110 degrees. This posture effectively reduces pressure on the lumbar spine, with the key being to have your entire back, especially your lower back, in contact with the chair back. Many chairs come with lumbar supports, which can be adjusted to the position that best supports the natural curve of your lumbar spine. For example, the Sihoo S300 has a uniquely designed lumbar pillow that can be adjusted accordingly to find the right support position.
3. Armrest Height Adjustment: Adjust the armrest height 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, relieving the burden on your shoulders.
4. Monitor Height Adjustment: Elevate the monitor so that your line of sight is level with the top edge of the screen, forcing your spine to stretch naturally and preventing you from unconsciously leaning forward, which can instantly increase the pressure on your neck by three to five times.
5. Activities After Prolonged Sitting: Every 30 minutes, use the chair to perform some simple activities. For hip joint stretching, sit on the edge of the chair with your feet spread apart to hip width, cross your ankles over the opposite knee, and slowly lean your back forward and downward until your chest and abdomen are pressed against your calves and knees. For lower back release, rotate to the side on the chair, use the arm closest to the chair back to hold onto it, and gently twist the front of your body towards the chair back. You can also try shoulder-opening exercises by sitting up straight and raising one arm over your head and tilting it to the opposite side, or holding onto the chair back with both hands behind you.
6. Special Function Usage of Executive Chairs: Executive chairs generally have two levers underneath. The right lever controls the height adjustment, and the left lever controls the recline tension of the chair back. Pulling up the left lever allows you to lean back; find your preferred angle and press down to lock it. Some high-end chairs also come with knobs to adjust the recline tension; people with a heavier build should tighten it, while those who want to relax during lunch breaks can loosen it. It is strictly prohibited to forcibly掰动 (this word may need to be replaced with a more appropriate English term like 'manipulate' or 'adjust' in a non-forceful context, but here it implies forceful action so 'forcefully adjust' could work, however for safety instructions, a clearer term like 'do not forcibly move') the pneumatic rod while standing, as this may cause it to break.