A new study called “Assessment of Stresses in the Cervical Spine Caused by Posture and Position of the Head” has found that looking at your smartphone puts as much as 60lbs of pressure on your neck.
In the regular position an adult head weights 10 to 12 pounds, when tilting the head forward the weight increases all the way up to 60lbs at a 60 degrees angle.
The research concludes that these stresses may lead to early wear, tear,degeneration, and possibly surgeries.
The recommendation is to make an effort to look at your phone in a neutral position as much as possible.
You can read the article here.