- Ergonomics is the study of human factors related to things people use; used to avoid health risks. Recommendations to minimize physical discomfort include take a 15-minute break every hour or two, to make sure your equipment is adjustable, and to use an ergonomic keyboard that have been developed to prevent injury from heavy computer use. Laptops have design issues with the keyboard because you are not able to adjust it, tablets have a design issue with the keyboard because most are virtual or laid flat on a table, and smartphones also have design issues with the keyboard because the thumbs are on a tiny keyboard.