beautypg.com

Musculoskeletal discomfort – Apple Macintosh LC 575 User Manual

Page 14

background image

Musculoskeletal discomfort

As with any activity that involves sitting for long periods of time,
using a computer can make your muscles sore and stiff. To
minimize these effects, set up your work environment carefully,
using the guidelines that follow, and take frequent breaks to rest
tired muscles. To make working with your computer more
comfortable, allow enough space in your work area so that you
can change position frequently and maintain a relaxed posture.

Another type of musculoskeletal concern is repetitive stress
injuries (RSIs), also known as cumulative trauma disorders
(CTDs). These problems can occur when a certain muscle or
tendon is repeatedly overused and forced into an unnatural
position. The exact causes of RSIs are not totally understood, but
in addition to awkward posture, such factors as the amount of
repetition, the force used in the activity, the individual’s
physiology, workplace stress level, and lifestyle may affect the
likelihood of experiencing an RSI.

RSIs did not suddenly arise when computers were invented;
tennis elbow and writer’s cramp, for example, are two RSIs that
have been with us for a long time. Although less common than
other RSIs, one serious RSI discussed more often today is a wrist
problem called carpal tunnel syndrome, which may be aggravated
by improper use of computer keyboards. This nerve disorder
results from excessive pressure on the median nerve as it passes
through the wrist to the hand.

This section offers advice on setting up your work area to
enhance your comfort while you use your computer. Since the
effects of repetitive movements associated with using a computer
can be compounded by those of other work and leisure activities
to produce or aggravate physical problems, proper use of your
computer system must be considered as just one element of a
healthy lifestyle.

No one, of course, can guarantee that you won’t have problems
even when you follow the most expert advice on using computer
equipment. You should always check with a qualified health
specialist if muscle, joint, or eye problems occur.

8 Setting Up