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  "publishedAt": "2026-05-07T10:21:01.000Z",
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  "textContent": "Your heart rate is more uneven than you think. This is what it says about your health Micro-fluctuations in the time between heartbeats are proving a helpful indicator of mental health, stress levels and exercise capacity. They could even provide insight into how well you are ageing. Artem…",
  "title": "Your heart rate is more uneven than you think. This is what it says about your health"
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