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  "path": "/what-is-zone-2-cardio-its-complicated?utm_medium=RSS",
  "publishedAt": "2026-04-24T14:30:00.000Z",
  "site": "https://lifehacker.com",
  "tags": [
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  "textContent": "Zones are based on your heart rate, but each app has its own idea of where they start and end.",
  "title": "Nobody Can Agree on What 'Zone 2' Cardio Is"
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