How to Sit on Computer

STEP 1: Your Chair

Push your hips as far back as they can go in the chair.
Adjust the seat height so your feet are flat on the floor and your knees equal to, or slightly lower than, your hips.
Adjust the back of the chair to a 100°-110° reclined angle. Make sure your upper and lower back are supported. Use inflatable cushions or small pillows if necessary. If you have an active back mechanism on your chair, use it to make frequent position changes.
Adjust the armrests (if fitted) so that your shoulders are relaxed. If your armrests are in the way, remove them.

STEP 2: Your Keyboard

An articulating keyboard tray can provide optimal positioning of input devices. However, it should accommodate the mouse, enable leg clearance, and have an adjustable height and tilt mechanism. The tray should not push you too far away from other work materials, such as your telephone.

Pull up close to your keyboard.
Position the keyboard directly in front of your body.
Determine what section of the keyboard you use most frequently, and readjust the keyboard so that section is centred with your body.
Adjust the keyboard height so that your shoulders are relaxed, your elbows are in a slightly open position (100° to 110°), and your wrists and hands are straight.

STEP 3: Monitor, Document, and Telephone

Incorrect positioning of the screen and source documents can result in awkward postures. Adjust the monitor and source documents so that your neck is in a neutral, relaxed position.

Centre the monitor directly in front of you, above your keyboard.
Position the top of the monitor approximately 2-3” above seated eye level. (If you wear bifocals, lower the monitor to a comfortable reading level.)
Sit at least an arm's length away from the screen and then adjust the distance for your vision

STEP 4: Pauses and Breaks

Once you have correctly set up your computer workstation use good work habits. No matter how perfect the environment, prolonged, static postures will inhibit blood circulation and take a toll on your body.

Take short 1-2 minute stretch breaks every 20-30 minutes. After each hour of work, take a break or change tasks for at least 5-10 minutes. Always try to get away from your computer during lunch breaks.
Avoid eye fatigue by resting and refocusing your eyes periodically. Look away from the monitor and focus on something in the distance.
Rest your eyes by covering them with your palms for 10-15 seconds.
Use correct posture when working. Keep moving as much as possible.