Keyboarding History - Ergonomics...Keyboarding History 1741 Henry Mill - British impression machine...
Transcript of Keyboarding History - Ergonomics...Keyboarding History 1741 Henry Mill - British impression machine...
Keyboarding History & Ergonomics
Keyboarding History
1741 Henry Mill - British
impression machine
1867 Christopher Sholes-American
Qwerty keyboard-slow down
With the widespread availability
of keyboards and the technical
advances, keyboarding is not
without health related problems.
Ergonomics
Is the science concerned with designing safe and comfortable machines for humans.
Ideal Computer WorkstationFurniture and Equipment
Stable work surface
Comfortable, ergonomic, adjustable chair with height and back support. Support the lower back.
Height adjustable regular slope keyboarding tray. Best for keeping elbows in and wrists in a neutral position.
Height adjustable, gliding mouse platform that allows the mouse to be positioned close to the body.
Keyboard should be comfortable, fits ones hands and allows one to work in a neutral hand and body posture.
Normal Work Area
Make sure that everything you need is
within this area.
Desk has a surface large enough to
support all of your materials.
Document holder to avoid head twisting.
Center the body according to the
alphanumeric keyboard.
Computer Monitor PositionMonitor that is height and angle adjustable works best.
Monitor should be placed directly in front of the user and facing the user, not angled.
Eyes should be in line with a point on the screen that is 2 to 3 inches below the top of the monitor.
If the text is too small, increase font size. Do no move the monitor.
Bifocal glasses need the monitor to be tilted slightly backwards.
Lighting
It should not be too bright or too dark.
Indirect lighting in combination with task
lighting works best.
If you use a task light make sure it is as
far away as possible. One should not be
able to see the light source.
No glare on the screen.
Avoid very glossy work surfaces;
contribute to glare.
Noise and Ventilation
Noise level must be comfortable.
When using headphones, make sure
they are at a comfortable noise level and
fit properly.
Should be in a well ventilated area, with
adequate heating and cooling in order to
minimize discomfort.
Taking Breaks is Important
Eye Breaks-eye moisture
Micro-breaks-rest hands, straight
posture.
Rest Breaks-every 30 to 60 minutes.
Ergonomic Software-Look for software
that will run in the background and
monitor how much you’ve been using
the computer.
Exercise Breaks-every 1 to 2 hours
depending on your needs.
Work Station Exercises
Deep Breathing
Head and Neck
Back
Shoulders
Wrists
Fingers and Hands
Tendon Gliding Exercises
Following these rules will increase your speed and accuracy at the computer as well as helping your body cope with long sessions at the keyboard.
Line up top of monitor with top of head.
Position screen at arm’s length.
Relax shoulders.
Bend elbows 90°.
Keep wrists straight.
Line up hips, shoulders, and ears vertically.
Place hips far back in chair, bent at 90°.
Using the correct posture at the keyboard can reduce eyestrain and fatigue and will result in a significantly better typing performance.
Keyboarding Injuries
People are always being told how typing for long periods of time is bad for you.
Poor typing posture can cause pain and other symptoms in your; Back, Neck and Shoulders, Hands and Wrists and Eyes.
Injuries
Hand/Wrist Problems
Musculoskeletal Disorders (MSD)-
Milder forms - discomfort, tenderness to
touch, inflammation, weakening of the tendons.
More serious - pain, numbness, tingling, loss
of sensation.
Carpal Tunnel Syndrome (CTS)
When the median nerve does not “work”
properly. When there is too much pressure on the nerve as it runs into the wrist through an
opening called the carpal tunnel. Eventually, the pressure inside the tunnel reaches a point
when the nerve can no longer function normally. Pain and numbness in the hand begin
and will progress if the cause is not eliminated.
When the wrist is in a neutral position, the carpal tunnel is as big as it can be so the nerve
has as much room as possible and injury can be prevented.
Shoulder and Back
Relax the shoulders to prevent tension.
Sit up straight and additional back
support to prevent lower back pain
Keyboarding Check List
Keystroke Pattern
Strike keys with quick motion.
Type with a steady, even rhythm.
Strike Enter key and Backspace key without looking.
Keep Fingers on home row keys.
Strive for accuracy.
Posture
Sit up straight.
Feet flat on floor.
Wrists up.
Elbows in.
Attitude
Follows directions.
Completes exercises on time.
Is prepared for class.
Work is well organized.
Has a good attitude.