Put down your phone and pick up your head. Texting might be ruining your back.

When you tilt your head forward 60 degrees to look at your phone, you're putting 60 pounds of pressure on your neck, according to a new study by New York spine surgeon Kenneth Hansraj. Hansraj's study was just published in Surgical Technology International's 25th edition.

As you bend your head down to look at the phone in your hands, the pressure on your neck gets stronger and stronger, as shown in Hansraj's illustration below:

Hansraj created a model of the spine via computer-aided design, and bent the head 0 degrees, 15 degrees, 30 degrees, 45 degrees and 90 degrees, all while measuring the force on the spine. "It's a very sophisticated assessment of the stresses that are borne by the neck when the head is in various positions," Hansraj said in a phone interview with The Huffington Post.

"This is one assessment just based on bringing the neck forward," Hansraj said. Different things could happen to your neck if you're bending it forward and to the side, he noted.

So what should you do to protect yourself?

"We recommend that people should continue to enjoy their smart devices, but that they pay specific attention to where their head is in space," Hansraj said. "You want to be careful that your head is straight up with you're using a smart device."