Being cut off from work email significantly reduces stress and improves focus. Heart rate monitors were attached to computer users in an office setting, while software sensors detected how often they switched windows. People who read email changed screens twice as often and were in a steady “high alert” state. Those removed from email for five days reported feeling better able to do their jobs and stay on task, with fewer stressful and time-wasting interruptions.
UC Irvine and US Army, May 2012