Why is finding the right chair so
important?
Today,
in industrialized countries, many people sit for most of the time that they are
awake. They sit while having breakfast, while going to work in cars or buses,
in school classrooms, in meetings, in offices, during dinner, and at home while
watching television. Many people also sit at work operating machines which new
technology has developed to replace manual work. Although sitting requires less
physical effort than standing or walking it puts a lot of stress on lumbar
area. Combined effects of a sedentary lifestyle and a job that requires sitting
can lead to many health problems.
What do you need to know about
selecting a good ergonomic chair?
The
selection of a suitable chair is a critical step in preventing health problems
in people who work in a sitting position. With the ergonomics approach, sitting
is viewed as a specific, specialized activity which is influenced by the way
that a sitting person interacts with the working environment.
Several
basic concepts should be considered:
·
One chair does not fit everyone.
The users' body dimensions must be used when selecting a chair so that it does
not strain one part of the body while fitting another.
·
Collect data about the user's body
height. The optimal seat height is about one quarter of the body height. This
is only a rule of thumb since the torso-to-leg ratio can vary widely..
·
No one chair is suitable for every
activity. For example, dentists require a different chair than do industrial
workers or computer operators
·
Consider maintenance and repair
costs. Check with the manufacturer for items to inspect for and how often
inspection should be done.
What are the features of a good
chair?
Some
features are mandatory for a good chair regardless of how you intend to use it:
·
Adjustability - Check to see that seat
height is adjustable.
·
Seat height range - Check whether the seat
height can be adjusted to the height recommended for the worker(s) who will use
it. Other chairs may have to be selected for very short or tall workers.
·
Backrest - Check to see that the
backrest is adjustable both vertically and in the frontward and backward
direction.
·
Seat depth - Select the seats that suit
the tallest and the shortest users
·
Stability - Check for the stability of
the chair; a five-point base is recommended.
Other
features to consider
·
See if the selected chair has
features that will help someone do their job better. Arm rests with adjustable
heights are good for computer operators. Wider or narrower arm rests may also
be required depending on the worker's dimensions and tasks they do.
·
See if the selected chair has
features that will make doing a job more difficult. An example may be that
someone may be using a chair with casters or wheels when a stable and
stationary work position would be better. If chairs with casters are needed,
choose ones that match the type of flooring you have (carpeting or hard
floors).
Who
should pick out the chair = Ergonomic Consultant
Can a chair solve all of the
ergonomic problems of working in a sitting position?
Also,
remember that the chair is only one of the components to be considered in
workstation design. All the elements such as the chair, footrest (if needed),
work surface, document holders, task lighting and so on need to have
flexibility and adjust-ability to be "designed in".
www.ergonomicworks.com