If you wear a smartwatch or smart ring to keep tabs on your health, you’re not alone. Nearly 40% of Americans now use some type of wearable. As reported by Reuters, Health Secretary Robert F. Kennedy Jr. has said he wants every American wearing one within four years as part of his Make America Healthy Again agenda.
But according to experts interviewed by The New York Times, the numbers your wearable collects aren’t equally valuable. While some can help identify real health concerns, others are better viewed as wellness tools than medical data.
The Health Numbers Your Doctor Is Actually Looking For
Your smartwatch tracks dozens of health metrics, but doctors say only a few really matter. According to The New York Times, the most useful include AFib detection, daily step count, and basic sleep habits.
Erica Spatz, MD, director of Yale’s preventive cardiovascular health program, told The New York Times that some smartwatches can accurately flag atrial fibrillation, a potentially dangerous heart rhythm. One Apple Watch study found irregular pulse alerts matched medical-grade ECG results 84% of the time.
Doctors also look at how much you move. Research reported in NYT has linked walking about 7,000 steps a day with a lower risk of heart disease, Type 2 diabetes, and dementia.
Sleep data can help, too. Cheri Mah, MD, a sleep physician and adjunct lecturer at the Stanford Sleep Medicine Center, told NYT that total sleep time and a consistent sleep schedule are more useful than detailed sleep scores. By contrast, metrics like blood oxygen, blood pressure, VO2 max, heart rate variability, biological age, and stress scores aren’t yet considered reliable enough for most medical decisions.
Related: The Next Big Longevity Trend Isn’t a Supplement
The Simple Way to Make Your Wearable Work for You
Instead of monitoring every statistic your device provides, focus on these habits:
- Aim for about 7,000 steps a day.
- Pay attention to changes in your resting heart rate or heart rhythm, especially if you have symptoms.
- Focus on getting enough sleep and keeping a consistent bedtime routine.
- Review weekly or monthly trends instead of checking your stats throughout the day.
- Share ongoing changes, not one-off readings, with your healthcare provider.
As Dr. Spatz told NYT, wearable devices can help tell your health story. But researchers are still figuring out which numbers doctors can confidently use to guide medical care.
Related: The Real Secret to Visible Abs After 40 Isn’t More Sit-Ups
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Author: Joseph Arangio

