ES : Lesson 2 : Chair Setup & Positioning

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Chapter : Ergonomics Safety
 

Lesson 2: Chair Setup & Positioning

 

Every one should be able to sit comfortably in the chair, using as much of the chair back as possible for support. The lumbar support should fit comfortably into the curve of your lower back, and your feet should be flat on the ground (use a footrest if necessary). The seat pan (i.e. the part on which you sit) should be an appropriate size that allows at least one inch between your legs and either side of the chair, and supports your legs without applying pressure to the back of your knees.

 

 

Adjustable Chair:

 

1. Adjust the Chair Height Start with your seat at the highest setting and then adjust downward until your legs and feet feel comfortable, and the back of your knees is at an open angle (90Ì or slightly greater, and not compressed).
2. Sit Back in the Chair Adjust the height and/or depth of the lumbar support to provide comfortable lower back support.
3. Adjust the ReclineIf the chair has a recline lock, set this at a comfortable position. Remember to unlock this periodically; this will allow the backrest to move with your back as you change posture. It's generally better to be slightly reclined, as this helps relieve tension from your lower back. If the chair allows you to, adjust the recline tension as you move back and forth so that the chair provides consistent support.
4. Adjust the Seat PanWhen sitting back, make any adjustments to the seat pan (e.g., seat pan tilt) to reach a comfortable position. The seat pan should extend about an inch on both sides of your legs, and should not apply pressure to the back of your knees.
5. Adjust the Armrest If possible, adjust the height, width, and position of your armrests to one most comfortable for how you work. Keep in mind that armrests will be used only between typing sessions, not while typing or using your mouse. Consider lowering or swinging the armrests out of the way when not in use so as to not inhibit your movement.
6. Clear Obstacles Make sure that the chair's casters (wheels) move smoothly, and that nothing obstructs your ability to position the chair in front of your desk and computer.

Non Adjustable Chair:

 

If you don't have an adjustable chair, consider purchasing one. It's a wise investment because it's such a crucial element in creating an ergonomically correct workspace. See our buyer's guide for more on what to look for before making a purchase.

• If you don't have an adjustable chair, you may need to think creatively to obtain an ideal sitting posture.
• If you sit low (i.e. there's a downward slope from your knees toward your body), consider sitting on a soft, evenly-filled cushion to provide the added height necessary.
• If you sit too high (i.e. there's an upward slope from your knees to your body), consider using a footrest to bring your thighs to a level parallel with the ground. If you don't have a footrest, use a firm and level alternative, such as a phone book.  
• If your seat pan is too deep (which creates pressure on the back of your knees), consider putting a back pillow between you and your backrest to push your body forward and into a better position.