This results in increased cervical spine stress!
As we look at the screen, text messages or touch the screen for more information, we almost always bend our head down to look down. This head forward position increases cervical compression and stress. The more the head bends down to look, the more the stress in the neck increases as the muscles have to work much harder that hold the head up. In a superb analysis Dr. Kennth Hansraj , Chief of Spine Surgery 0f New York Spine Surgery & Rehabilitation Medicine, showed that stress on the cervical spine increases from 10-12 lbs when the head is in its upright position to 60 lbs when looking down.Looking down for a short time period is no problem; however, many of us look down for extended periods. This slouched collapsed position is becoming the more dominant position.
My suggestion is that everytime you go to reply to a text message- take an inventory of your posture and fix it. Small corrections will not only make you mindfull but produce slow gains in the right direction.
Figure 1. Stress on the cervical spine as related to posture. (From: Hansraj, K. K. (2014). Assessment of stresses in the cervical spine caused by posture and position of the head
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