Spending too much time on the computer causes people to be inactive too much. It reduces the desire to get out and play and do physical exercise. As people become more inactive, it causes their physical health to decline. People should limit their time on the computer and replace some of the time with outdoor and physical activities.
Spending too much time on the computer does not only strain the eyes and contributes to an increasing inability to concentrate on one task at a time, but it is most harmful when it takes away from living life the way it was designed to be lived. Direct human interaction, physical work or the chance to experience the beauty of nature - all essential for a happy life - are often hindered by choosing the computer over them.
Yes, it is harmful to spend too much time on your computer because of the adverse physical effects. Too much computer time results in numerous physical problems, including eye strain, repetitive strain injury and lethargy. Individuals who suffer from carpal tunnel syndrome usually contract the injury from prolonged typing and mouse use.
While it can be harmful, it is not any worse than spending time watching television or doing office work. Having proper posture and ergonomic hand and arm motion, as well as getting up to walk around for a few minutes each hour, keeps any damage from occurring even during long computer sessions.