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by ttonelli
934 days ago
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Those are heart rate zones, high intensity interval training (HIIT) is zone 5. Here's the first description I found: https://www.polar.com/blog/running-heart-rate-zones-basics/
Since it's interval training, just doing 10mins hard is not what's prescribed. It's more like doing repetitions of, say, 2 mins easy and 30s sprints. |
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