Apple LC 550 manual Musculoskeletal discomfort

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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.

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Contents Getting Started Contents Apple Computer, Inc FCC statement Communications regulation informationVcci statement Setting Up Plugging in the computer Connecting the mouse and keyboard Turning on your computer for the first time Page Safety instructions Problems starting up?Health-related information about computer use Musculoskeletal discomfort Arranging your office Eye fatigue45-70 cm 18-28 Avoiding fatigueWhat’s next? Learning the Basics Continues Put the tip of the arrow inside this picture Now your screen should look like the following illustration Turning the computer on and off Turning on the computer Shutting down the computer with a menu commandYour Computer at a Glance ≤ Power plug Main power switch ADB ports Adjusting the sound Using Special FeaturesUsing the sound control buttons on the computer Using the Sound control panelAdjusting the screen Using the built-in microphoneUsing the screen control buttons on the computer Disabling the buttons on the front of your computer Using the Screen control panelSaving energy Installing an expansion card Page Continues Slide the logic board back Using a RAM disk for temporary storage Starting up your computer from an external hard disk Advice about using a modemApple Publishing System Apple Computer, Inc