Checking your phone interrupts that gentle climb. According to Alfredo Rodriguez-Munoz, a professor of psychology at Complutense University of Madrid, looking at your phone right after waking pushes the brain “from a state of recovery to a state of alert in a matter of seconds.” Instead of easing into the day, the nervous system is pulled straight into demand mode, often before you’ve even had breakfast. Over time, this can leave mornings feeling rushed and tense before anything has actually gone wrong.