New Research Shows Smartwatches Can Effectively Screen for Sleep Apnea

A recent study has found that consumer smartwatches may serve as a reliable tool for identifying adults with moderate-to-severe obstructive sleep apnea. This common sleep disorder often goes undiagnosed, leaving many people without necessary treatment for their breathing issues during the night. The research offers a new, accessible way for individuals to screen for the condition using technology they may already own. Researchers focused on the performance of the Samsung Galaxy Watch in detecting signs of the disorder among adults aged 22 and older. The device demonstrated high accuracy, correctly distinguishing those with moderate-to-severe sleep apnea 94 percent of the time. These findings were published in the Journal of Clinical Sleep Medicine on August 27, 2026. The study involved 147 participants who either had a prior diagnosis of the condition or a high likelihood of having it. Participants wore the Galaxy Watch 6 for two nights during clinical sleep studies at the Stanford Health Care Sleep Medicine Center. They also wore the device for three additional nights in their own homes to test its performance in a real-world setting. Lead author Arash Alavi, who serves as the director of software engineering at Samsung, noted the importance of the multi-night validation. He explained that the team compared the watch's sleep apnea feature against standard overnight sleep study results. The study measured key indicators such as the apnea-hypopnea index and hypoxic burden to ensure the watch's readings were consistent. Obstructive sleep apnea occurs when the muscles in the upper airway repeatedly collapse during sleep, causing pauses in breathing. If left untreated, the condition can lead to significant health problems, including heart disease, hypertension, and stroke. Many patients struggle with traditional treatments like continuous positive airway pressure, or CPAP, machines, which often require uncomfortable masks. By providing a simpler screening method, researchers hope more people will seek a formal diagnosis and medical care. The American Academy of Sleep Medicine, which represents thousands of sleep health professionals, highlighted the study as a step forward in sleep care. The organization noted that wearable technology is becoming an increasingly useful tool for identifying sleep disorders early. While the watch is not a replacement for a clinical diagnosis, it provides a convenient starting point for patients to discuss their health with a doctor. Future efforts will likely continue to explore how digital health tools can bridge the gap between home monitoring and professional medical intervention. As technology advances, these devices may play a larger role in managing chronic conditions that impact global public health.