The average human head weighs between 10 and 12 pounds, and when we bend our neck to text or check Facebook, the gravitational pull on our head and the stress on our neck increases to as much as 60 pounds of pressure. That common position, pervasive among everyone from paupers to presidents, leads to incremental loss of the curve of the cervical spine. “Text neck” is becoming a medical issue that countless people suffer from, and the way we hang our heads has other health risks, too, according to a report published last year in The Spine Journal.

Posture has been proven to affect mood, behavior and memory, and frequent slouching can make us depressed, according to the National Center for Biotechnology Information. The way we stand affects everything from the amount of energy we have to bone and muscle development, and even the amount of oxygen our lungs can take in. Body language, perceptions of weakness versus power — it’s all real.

Keep Your Head Up: How Smartphone Addiction Kills Manners and Moods