Laptop posture problems

Laptop computers pose unique challenges because there is no setup that allows correct monitor height at the same time as correct keyboard and mouse height without other devices.

In Posture A, the monitor might be at the right distance (depending upon how well the user can see), but the keyboard is too high and the monitor is too low. The user is sitting much too far away from the table, causing stress in the shoulders, neck and back due to his extended arms.

The person in Posture B is stabilizing his elbows on his knees, dropping his wrists on the front of the laptop, holding his head forward, and elevating his shoulders. Both the screen and the keyboard are too low and the keyboard is too far away. Neck, shoulder and back pain are a result of this extremely stressful posture that restricts circulation and causes irreparable damage to soft tissues.

The child in posture C is resting his wrists and upper arms on the sharp edge of the work surface, a perfect recipe for inducing carpal tunnel syndrome. Also, his elbows are at an acute angle which puts strain on the cubital tunnel in the elbows, risking another of the “tunnel” syndromes. In addition, he is getting no low back support from the inappropriate chair. An adjustable chair would still not create a safe environment since the table is too high and the laptop is not set up correctly.

Most people will eventually end up slumping to see the display, as shown in the left illustration below. Using a laptop stand with an external keyboard and mouse will set both the screen and input devices (i.e., keyboard and mouse) at the correct height, assuming the work surface is correct, as seen in the right illustration.

Date: 2015-09-26; view: 310; Нарушение авторских прав