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Title: Occupational Health and Safety/Ergonomics - UCSF/UCB Ergonomics Program Computer Tips Tips for healthy computer use by the University of California's Ergonomics Program. |
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ERGONOMICS: Services
Safe Computer Use Tips
As we use computers for longer
hours every day, we may notice increasing aches and pains in some parts
of our bodies. These musculoskeletal problems can happen in anyone who uses
a computer for long hours: computer programmers, engineers, data entry workers,
telephone operators, customer service workers, and even graduate students.
The problems can range from minor muscle aches that last less than a few
hours to persistent tendon problems that can last for years. The more severe
problems can lead people to leave a job they like or stop doing sports activities
they enjoy, like tennis or bicycle riding. So we should do what we can to
prevent the minor aches of work from progressing to disabling conditions.
The most common body areas to watch for are the hands, wrists, elbows,
shoulders and neck. The problems may vary from aches to pain, burning,
numbness or tingling. These symptoms may be felt during typing or mouse
use or at other times when no work is being done, including during the
night when the symptoms might wake you up. If you experience these
symptoms, or other persistent or recurring pain that you think may be
related to using a computer, you should see a qualified physician or talk
to your companyÍs health and safety staff. The earlier a problem is
properly diagnoses and treated, the less chance there is that it will
progress to a disabling condition.
Now, having said that, you should know that most often these problems are
not serious and will go away with a little attention to the way you
work. First of all
, the more hours you work, the greater your risk. In my patients I
frequently hear that their problem started after they worked on a project
with a tight deadline. For example, they worked for 10 to 12 hours a day
for two weeks, and the ache that started in the elbow just never goes
away.
Point 1.
When working on the computer for long hours, pay attention to
tension, discomfort or pain you feel and take immediate action to relieve
it.
Point 2.
Make sure you stand up and walk away from your computer on a
regular basis. Just walk around for a few minutes, stretch, and relax.
This should be done at least every hour. For my patients I recommend
that they use a timer and get away from their computer every 20 to 30
minutes.
The greatest risk for these problems occurs when people use computers
intensely for long hours and work in poor postures. Ergonomics is the
study of understanding the limitations of the human body in order to
design productive and comfortable workplaces, tools and work tasks. We
study what postures are comfortable for computer work and what are not.
Figuring out how to properly set up your workstation, chair, monitor,
keyboard and mouse can be a complicated task because when you adjust one
thing, like the height of the chair, it can effect something else, like
your wrist angle. The goal should be to adjust everything so that your
body is in a comfortable posture that you would not mind being in for
hours. You would not drive a car without adjusting the seat and mirror.
Likewise, you should not drive the computer without adjusting it to your
body. Here is an overview of how to adjust your workstation
Point 3.
Adjust you chair so your feet and back are firmly supported by
the floor and seat back. You should lean back in your chair a little.
Arm rests can be a nuisance; they can press on the elbow or prevent you
from pulling your chair forward.
Point 4.
Position the monitor so the top is about at the level of your
eyes and it is straight in front of you. It should be about an arm
length away. If it is difficult to see the small characters check the
glare, monitor resolution, or your eyes. You may need glasses (bifocals
can be a problem). You should not have to lean forward to see your
work. If you are frequently reading from books or papers when using the
computer, use a sturdy document holder set next to the monitor.
Point 5.
The keyboard should usually be at a low height, near the height
of your elbows and the mouse or trackball should be right next to the
keyboard. They can be higher if you have a padded surface to rest your
forearms on. I am not a big fan of wrist rests; the wrist is a sensitive
part of the body and it should not be constantly resting on something.
Having to continuously reach for the keyboard or mouse may lead to
shoulder pain. If you have to reach for the keyboard or mouse (for
example with a high desk surface), rest your arms in the middle area of
the forearms. Generally the keyboard should be flat so that the wrists
are relatively straight.
Point 6.
Try a different keyboard, mice and trackball -- there are many
alternative designs on the market and it is up to you to find the one
that works best for you. Some people find using the mouse
uncomfortable. They can try using the mouse with their other hand or try
switching to a trackball. People with hand and wrist pain may want to
try the Microsoft Natural Elite keyboard; it appears to reduce hand pain.
Finally, the stresses of work can make aches and pains worse. The
stresses of deadlines has already been mentioned. Ideally, you should
try to set up your work so you can control the pace and flow of your
work, so that you can take a break when you need to and not feel like you
have to work through your coffee break or lunch breaks. As mentioned,
get away from the computer for a few minutes regularly. Sometimes a
coworker or the supervisor may get on your nerves. Try to constructively
resolve these conflicts; do not let them fester.
As one of my professors said once, "The job you do should be something
you look forward to doing every day, something that you would rather do
than anything else in the World". Not all of us are fortunate enough to
have a job like that. But we can take steps to make our work better and
safer.
It's Your Body
Long hours on the computer can be rewarding, even fun, but they can also
lead to aches and pains in your neck, shoulders, arms and hands. If you
ignore these aches and continue working with improper work habits you may
develop painful and disabling injuries.
You may have heard of some of these musculoskeletal problems:
tendinitis, carpal tunnel syndrome, and other health problems referred to
as repetitive strain injuries (RSI) or cumulative trauma disorders.
Why some people develop these problems and others do not may be due to
things like our age, physical conditioning, medical conditions (e.g.,
pregnancy, diabetes), hobbies (e.g., musical instrument use, weight
lifting), and our ability to relax and get along with co-workers and
supervisors.
But they also can be brought on by long uninterrupted hours at the
computer, especially under stressful work conditions, using improper work
habits and improper postures. Although setting up your computer may seem
intuitive and as simple as pulling up a chair and reaching for the mouse,
it takes deliberate effort to use your computer properly.
The purpose of this guide is to help you set up your computer and develop
good work habits so that you can be productive and comfortable when using
the computer.
If You Have Pain
If you experience recurrent, persistent or worsening discomfort,
especially if the discomfort includes pain, numbness or weakness,
promptly consult a qualified physician.
The earlier a problem is correctly diagnosed and treated, the easier it
is to take care of and the less chance there is that it will progress to
a disabling condition.
Computer Workstation Checklist
Follow this link to a PDF document to be used in the evaluation of computer workstations.
Keyboard Shortcuts
Note: For Mac users, please substitute the Command key for the Ctrl key.
This substitution with work for the majority of commands
_______________________________________________________________________
General Commands
Navigation
Windows key + D Desktop to foreground
Context menu Right click
Alt + underlined letter Menu drop down, Action selection
Alt + Tab Toggle between open applications
Alt, F + X or Alt + F4 Exit application
Alt, Spacebar + X Maximize window
Alt, Spacebar + N Minimize window
Ctrl + W Closes window
F2 Renames a selected file or folder
Open Programs
To open programs from START menu: Create a program shortcut and drop it
into
START menu
To open programs/files on Desktop: Select first letter, and then press
Enter to
open
Dialog Boxes
Enter Selects highlighted button
Tab Selects next button
Arrow keys Selects next (>) or previous button (<)
Shift + Tab Selects previous button
_______________________________________________________________________
Microsoft Word
Formatting
Ctrl + P Print
Ctrl + S Save
Ctrl + Z Undo
Ctrl + Y Redo
CTRL+B Make text bold
CTRL+I Italicize
CTRL+U Underline
Ctrl + C Copy
Ctrl + V Paste
Ctrl + X Copy + delete
Shift + F3 Change case of letters
Ctrl+Shift+> Increase font size
Ctrl+Shift+< Decrease font size
Highlight Text
Shift + Arrow Keys Selects one letter at a time
Shift + Ctrl + Arrow keys Selects one word at a time
Shift + End or Home Selects lines of text
Change or resize the font
CTRL+SHIFT+ > Increase the font size
CTRL+SHIFT+ < Decrease the font size
CTRL+SHIFT+F Change font and size
_______________________________________________________________________
Microsoft PowerPoint
Navigation
Page Up/Down Moves to next/previous slide
Ctrl + M Insert a slide in current presentation
Ctrl + W Close a presentation
F5 View slide show from beginning
Shift+F5 View slide show from current slide
Esc Cancel an action
Alt + V, then D View slide sorter
Alt + O, then N Format text box (colors and lines)
Alt + I, then X Insert text box
Select and move text/objects
Tab Selects and cycles forward through objects (if cursor is in text box,
press ESC; box can now be moved, copied, pasted, formatted, etc.)
Shift + Tab Selects and cycles backward through objects
Enter Positions cursor within an object when the object is selected
Arrow keys Shifts location of text box once selected (press ‘Esc’
to de-select)
________________________________________________________________________
Microsoft Excel
Worksheet navigation
Ctrl + Home Cursor at beginning of worksheet
Home Cursor at beginning of row
Ctrl + Arrow Keys Moves to edge of current data region
Tab Moves to next cell
Shift + Tab Moves to previous cell
Alt + Page Up, Page Down Move one screen to the left, right
Ctrl + Page Up, Page Down Move to the next/previous worksheet
Ctrl + Tab, Shift + Tab Move to the next/previous workbook
Edit Worksheet
F2 Edit active cell/put cursor at end of line
Ctrl + Shift + Plus Sign (+) Insert blank cells or rows and columns
Ctrl + Hyphen (-) Delete selected cells
Shift + Space Bar Highlights entire row
Ctrl + Space Bar Highlights entire column
Shift + Arrow Keys Highlights cells
Delete Clear contents of selection
Ctrl + Z Undo last action
Shift + F11 Insert a new worksheet
__________________________________________________________________
Mozilla Firefox (Web)
Navigation
Back Alt + Left Arrow
Backspace
Forward Alt + Right Arrow
Shift + Backspace
Home Alt+Home
Select location bar Alt+d
F6
Ctrl+L
History Ctrl+H
Caret browsing F7 (navigation by cursor)
Current page
End of page End
Beginning of page Home
Text size increase Ctrl+ +
Text size decrease Ctrl+ -
Text size restore Ctrl+ 0 (zero)
Tabs
New tab Ctrl+T
New Window Ctrl+N
Next tab Ctrl+ Tab
________________________________________________________________________
Mozilla Thunderbird (Email)
Ctrl+M
Ctrl+N New Message
Ctrl+W Close Window
Del Delete Message
Ctrl+L Forward Message
F8 Toggle Message Pane
F Go to Next Message (Forward)
B Go to Previous Message (Back)
Ctrl+R Reply to Message (sender only)
Ctrl+Shift+R Reply to All in Message (all recipients)
Ctrl+Enter Send Message Now
Spacebar Scrolls through message
Enter View message in window
Tab Moves cursor between fields
_______________________________________________________________________
Here's a link to the keyboard shortcuts document if you'd like to print
it out (Document).
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Tips | for | healthy | computer | use | by | the | University | of | California's | Ergonomics | Program. | |
http://www.me.berkeley.edu/ergo/services/tips.html
UCSF/UCB Ergonomics Program Computer Tips 2008 November
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Tips for healthy computer use by the University of California's Ergonomics Program.
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