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  "path": "/news/2026-03-zone-heart-zones-health.html",
  "publishedAt": "2026-03-27T08:30:01.000Z",
  "site": "https://medicalxpress.com",
  "textContent": "Runners, cyclists and gym-goers with wearable fitness trackers are no doubt familiar with the five \"heart rate\" zones. Ranging from low to very high intensity, these zones are calculated as percentages of a person's maximum heart rate and correlate with the intensity of any given workout. Maximum heart rate is often estimated as 220 minus your age.",
  "title": "Zone 2, 3, 4? What do heart rate zones mean for your health?"
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