Are Health Trackers Making Us Healthier, or Just More Anxious?

Millions of people now wear devices on their wrists or fingers that track their heart rate, sleep, and blood oxygen every day. Smartwatches, fitness bands, and smart rings have made health tracking a normal habit for many Americans. But doctors are asking an important question: are these devices actually helping people stay healthy, or are they making people worry too much about numbers that don't really matter?

Dr. Scott Braunstein is a doctor who specializes in both internal medicine and emergency medicine. He works at Sollis Health, a medical practice where patients can reach a doctor any time of day or night. He sees patients regularly who come in worried about alerts from their smartwatches, and he says most of those alerts turn out to be false alarms caused by a loose band, a sweaty wrist, or an arm pressed against a pillow the wrong way.

Still, Braunstein has also seen wearables catch something serious. One patient's Apple Watch showed that her heart rate had been unusually high for several days in a row. When she came in for tests, doctors found she had a dangerous thyroid condition called thyrotoxicosis, which needed urgent treatment. 'The device identified that something was wrong,' Braunstein said, 'but it couldn't determine the cause.'

So which alerts are actually worth worrying about? Braunstein says the ones to take seriously include notifications about an irregular heart rhythm, low blood oxygen during sleep or exercise, and any big change from a person's normal baseline — especially if it comes with chest pain, dizziness, or a racing heartbeat. A brief spike in heart rate that lasts twenty minutes and goes away on its own is usually nothing to worry about. 'A wearable notification alone rarely tells the full story,' Braunstein explained.

Some health metrics are more useful than others. Heart rhythm monitoring is one of the most valuable, because a condition called atrial fibrillation — an irregular heartbeat — affects about one in three people at some point in their lives and can raise the risk of stroke. Sleep tracking can also be helpful, since research shows that people with healthy sleep patterns live longer than those who sleep poorly. Blood oxygen readings during sleep can be an early warning sign of sleep apnea, a common condition that is treatable once doctors know about it.

One number that many people ignore is resting heart rate, which is how fast your heart beats when you are completely at rest. Braunstein calls it one of the simplest and most useful numbers to track. A lower resting heart rate usually means your heart is in better shape, and a change from your normal resting rate can be an early sign of illness, dehydration, or poor recovery — sometimes days before you feel any symptoms.

Sleep scores, on the other hand, get a lot of attention but may not deserve it. Braunstein says these scores often overestimate how badly someone slept, because no consumer device can truly measure the stages of sleep the way a hospital sleep lab can. A better habit is to look at how long you slept alongside your heart rate and blood oxygen levels overnight, rather than stressing over a single score.

Overall, Braunstein sees health trackers as a good thing. He says many of his patients have been motivated to exercise more, sleep better, and manage stress because of what they see on their devices. But a smaller group gets too focused on individual numbers and panics over readings that mean nothing. The people who benefit most, he says, are those who treat a single alert as a reason to check a trend over time — not a reason to panic. And when something does seem off, the right move is always to talk to a doctor, not just stare at the app.