Tech neck (text neck): the head-angle load model and what studies found

Tech neck, also called text neck, is the term for neck and shoulder strain that people connect to tilting their head forward and down over a phone or tablet. It is not a formal diagnosis, and the research on it is mixed: phone use and neck pain are associated in some studies, and a 12-month study of 457 people found that neck flexion during phone use was not a risk factor while poor sleep and low physical activity were ^[4]. This page explains the head-angle load model behind the popular claims, what the studies found, and how to change your phone habits.

Working on a laptop is a related but separate problem with a different solution. See the laptop neck guide for setup changes.

How much does your head weigh as you tilt it forward?

The numbers you see everywhere trace to a 2014 paper by Kenneth Hansraj. It estimated that an adult head weighs 10 to 12 pounds (about 4.5 to 5.5 kg) in a neutral position, and that the force on the cervical spine rises as the head tilts forward ^[1]:

Cleveland Clinic repeats the 27, 40, and up to 60 pound figures in its tech neck guidance ^[2].

Treat the table as a picture of how a lever works. The further your head is ahead of your spine, the harder the muscles at the back of your neck work to hold it up. Three cautions apply. The figures come from a biomechanical model, not from measurements taken on people. The paper did not test whether those loads cause pain, injury, or wear in the spine. And the load your muscles carry depends on more than head angle, including how long you hold the position and how strong and rested those muscles are.

Does phone use cause neck pain?

The evidence points to an association, with caveats.

A 2025 meta-analysis pooled seven retrospective studies covering 10,715 people. People classed as smartphone overusers had higher odds of neck pain, with a pooled adjusted odds ratio of 2.34 (95% confidence interval 1.44 to 3.82) ^[3]. Retrospective studies depend on people remembering their habits, and "overuse" was defined differently across studies.

A 2025 study followed 457 participants for 12 months, with 396 completing follow-up. It measured neck flexion during smartphone use with a device rather than by asking. Flexion angle did not predict neck pain a year later. Low sleep quality (odds ratio 1.76, 95% confidence interval 1.17 to 2.63) and insufficient physical activity (odds ratio 2.41, 1.03 to 5.65) did, though only 40 people (10%) reported neck pain, so the intervals are wide ^[4].

Taken together, spending long hours on a phone goes along with more neck pain, but the head angle itself may not be the main driver. Sleep, activity, and how long you stay still all seem to matter. That is a reason to change your habits broadly and not only to chase a perfect angle.

How much does a tablet or phone bend your neck?

In a motion-capture study of 30 people, seated tablet use added about 17 degrees of neck flexion compared with a seated desktop, and laptop use added about 11 degrees. Tablet use also raised the right shoulder about 10 degrees more ^[5]. Handheld devices tend to sit low, in your lap or on a table, which pulls your gaze down.

What phone habits reduce head-down time?

None of these is a proven treatment. They are low-cost ways to reduce how long and how far you tilt.

• Raise the device toward eye level instead of dipping your chin. Cleveland Clinic recommends bringing devices up, using stands, and using hands-free options where you can ^[2].
• Rest your elbows on a table or your body so your arms hold the phone up. A lower arm position makes you drop your head to compensate.
• Change position often. Cleveland Clinic's guidance is that "the best posture is a moving posture," with sessions of 15 to 30 minutes at a stretch ^[2]. OSHA's workstation guidance also says that staying in one posture for long periods is not healthy ^[7].
• Use voice input or larger text for long messages so you can look up between lines.
• On a tablet, use a stand or case that props it at an angle, and pair it with a keyboard for typing.
• Move between screens and non-screen time. Sleep and physical activity showed up as risk factors in the longitudinal study above ^[4].

How can you check your head position?

Take a side photo while you use your phone as you normally would, not while posing, and look at how far your ear sits ahead of your shoulder. The forward head posture guide explains the side-photo test and the wall test. If you work at a laptop, the free check at /posture-check/ uses your webcam to compare your head and shoulder position while you work against a sitting-tall reference you record first. The video stays on your device.

A forward head position is associated with neck pain in adults, but the studies are cross-sectional and mixed by age. A 2019 review found the association in adults and no clear one in adolescents ^[6].

Which exercises go with tech neck?

Gentle movement is a good break from a head-down position. Start with the chin tuck, then the upper trapezius stretch. The 5-minute desk routine combines several. Stop if a movement causes sharp pain, tingling, or numbness.

When should you see a clinician?

See a clinician if your neck pain lasts more than a few weeks, spreads down an arm, comes with numbness, tingling, or weakness in your hand, follows an injury, or comes with new or severe headaches. Some symptoms need urgent care. The guide on when to see someone lists them with sources. Cleveland Clinic lists numbness and tingling in the arms, hands, and fingers among tech neck symptoms ^[2].