It is also possible that repeated overuse of a muscle group could cause muscle strain and pain. This happens mostly because children learn unhealthy computer habits. They tend to use adult-size workstations and furniture, and then develop awkward positions to compensate. Kids may dangle their legs from the chair, sit with their backs hunched over, lift their chins toward the monitor (usually above eye-level), and reach up to click the mouse. These habits, if not corrected, can lead to troubling symptoms and possible disability. We can help by encouraging good posture with feet planted comfortably on the floor (or put something on the floor under the feet), keeping the mouse at elbow height, and lowering the monitor to eye level. A height-adjustable keyboard may be a relatively inexpensive answer. You might even include instructions on your screensaver to remind your child of good work habits.
In addition, computer use seems to play a role in the trend of increasing obesity in children. Use of television, video games, and computer games leads to less physical activity. Snacking also tends to occur more frequently in children who remain in front of computer or TV screens. Besides encouraging more regular physical activity, limiting screen time to a certain number of after-school hours per day or only for homework is a good place to start.