Selecting a Chair

Chair fit is important when selecting a chair. You should consider the size and shape of your back when choosing a chair. A single size and type of chair is not appropriate for all tasks and cannot suit all body shapes and sizes.

When you sit to perform a task, your spine is most comfortable when it’s in "neutral posture", an upright position about halfway between full forward bending and backward arching. A chair can help you maintain this position if it provides proper support.

For the most comfort and best fit, the chair should have the following adjustment options:

SEAT:

• Height: The seat height should adjust to fit the height of the user and/or the work surface.
• Tilt: The seat should adjust to a variety of selected angles to allow for a comfortable posture for different tasks. Some chairs offer a rocking motion.
• Depth: The depth of the seat should adjust to provide support for your legs. There should be a 1" to 2" space between the front edge of the seat and the back of the knees. Ability to slide the seat backward and/or forward will allow you to set the proper depth position.

BACK:

• Height: The back should adjust up and down to fit the curves of your spine to provide support and comfort. Adjustable lumbar support is often necessary to accommodate flat, average or deep spinal curves.
• Contour: The back of the chair should make full contact with your back when you are in your normal working position. If you recline, a back that extends up to your upper back or even a neck support may be indicated.
• Angle: The back should adjust independently from the seat tilt to provide back support for a variety of work positions such as reclining or leaning forward.

ARMS:

• Arms are useful to provide additional upper extremity and back support when taking breaks or pauses between writing or keying tasks.
• Height: If you choose a chair with arms, they should be adjustable to your height. Your arms should be able to rest on the chair arms with your shoulders in a relaxed position.
• Width: Inward and outward adjustment provides additional personal fit. This is especially important with smaller or larger than average size individuals.

Maintaining good posture is important to prevent back and neck problems. Use of an ergonomically sound chair combined with good work habits and good posture habits can help you work more efficiently and comfortably.