Apple Mac Pro (Early 2008) Specifications download pdf (Page 68)

68 Chapter 5 Last, but Not Least

Change hand positions often to avoid fatigue. Some computer users might develop

discomfort in their hands, wrists, or arms after intensive work without breaks. If you

begin to develop chronic pain or discomfort in your hands, wrists, or arms, consult a

qualified health specialist.

External Mouse

If you use an external mouse, position the mouse at the same height as the keyboard

and within a comfortable reach.

Chair

An adjustable chair that provides firm, comfortable support is best. Adjust the height

of the chair so your thighs are horizontal and your feet are flat on the floor. The back of

the chair should support your lower back (lumbar region). Follow the manufacturer’s

instructions for adjusting the backrest to fit your body properly.

You might have to raise your chair so that your forearms and hands are at the proper

angle to the keyboard. If this makes it impossible to rest your feet flat on the floor, you

can use a footrest with adjustable height and tilt to make up for any gap between the

floor and your feet. Or you can lower the desktop to eliminate the need for a footrest.

Another option is to use a desk with a keyboard tray that’s lower than the regular work

surface.

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Apple Mac Pro (Early 2008) Specifications Page 68