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  "path": "/news/2026-06-smartphone-heart-potentially-health-billions.html",
  "publishedAt": "2026-06-04T09:40:06.000Z",
  "site": "https://medicalxpress.com",
  "textContent": "Wearable devices like smartwatches and fitness trackers have revolutionized the way we monitor our health. Worn around the clock, these devices quietly collect valuable data—from heart rate and blood oxygen levels to sleep quality—giving users a real-time window into their well-being without disrupting their daily lives.",
  "title": "Smartphone unlock can measure heart rate, potentially bringing health monitoring to billions worldwide"
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