For a good sitting posture, your feet should be flat on the floor. Leave three to four fingers' width between the seat of your chair and the back of your knees. The lower back support of your chair should sit just above your belt. Your arms rest relaxed on the armrests, set at roughly elbow height.
What is a good sitting posture at your desk?
Always place your screen and keyboard directly in front of you. Make sure the top edge of your screen is at eye level. Keep an arm's length between your eyes and the screen, and move your mouse from your forearm. Finally, place your keyboard about fifteen centimetres from the edge of the desk.
Adjust your backrest and elbow room if you have an adjustable chair and desk. The lumbar support should sit just above your waistband. The armrests should be level with the desktop, so that your shoulders stay relaxed.
Moving while you sit
Change your sitting position regularly and take a break every 20 to 30 minutes by standing up and moving around. It is important to leave your chair free to move rather than locking it.
Source: gezondheid.be
FAQ: Good sitting posture at the office
- How much space should there be between your chair and the back of your knees? Leave three to four fingers' width between the seat of your chair and the back of your knees for a good sitting posture.
- At what distance and height should you place your computer screen? Keep an arm's length between your eyes and the screen, and make sure the top edge of the screen is at eye level.
- Why is it better not to lock your office chair? By leaving your chair free to move, you allow yourself to change position regularly and to stand up and move every 20 to 30 minutes, which prevents long periods of sitting still.