en proves
18 d'abril del 2005
Portàtils poc ergonòmics, dolors assegurats
Comercials, enginyers, estudiants universitaris, i fins i tot nens. Els dolors d’esquena, d’espatlles i de coll són el pa de cada dia de bona part del creixent nombre d’intrèpids usuaris d’ordinadors portàtils. Però què hi poden fer?, el disseny actual impossibilita una posició ergonòmica.
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(..) The painful result for the 29-year-old from Seattle is the same as it is for the growing legions of laptop users (..): Her neck and wrists ache. Her doctor warned her she already has the skeletal health of a 50-year-old.

"But what can I really do?" (..) "My laptop is the only way to go for my work. I couldn't live without it."


(..) thousands are suffering persistent back, shoulder, wrist and neck aches.

The culprit: The keyboard and screen on laptops are too close to each other.

"When you use a laptop, you can make your head and neck comfortable, or you can make your hands and arms comfortable, but it's impossible to do both," says Tom Albin of Human Factors and Ergonomics Society, (..)

College students, who increasingly are required to own laptops and use them in lecture halls built for 20th-century academic life, are having a particularly rough time.


Nearly 49 million laptops were sold worldwide in 2004, almost double the number sold in 2000, an increase from 20.3% of the computer market to 28.5%. Meanwhile, the cost plummeted (..) Analysts predict U.S. laptop sales could overtake desktop sales by 2008.

Few health studies have been conducted, but one study in 2002 showed that laptop users complain of pain in more and different body parts than desktop users, (..)

That's because desktop users have the ability to set the top of the screen at eye level and the keyboard about 20 inches below that for optimum posture.


Laptop accessories aimed at improving ergonomic conditions are a growing niche. (..)


Toshiba announced earlier this year that it would soon sell a laptop that allows screen and keyboard to become two pieces to allow more flexible positioning.

And, Bernstein noted, some manufacturers are experimenting with laser keyboards that shine images of a keyboard on any surface and allow computer users to type on it.


Experts say the sooner, the better. Ergonomists increasingly are concerned that laptop use among children (..) many fear that those who have learned poor ergonomics in their youth will find it difficult to learn better posture later on. (..)


"I hate the fact that these are the workers of tomorrow, and they have upper-extremity problems before they even get to the workplace," (..)
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