As endurance athletes, we're used to monitoring our heart rate while we're working out. But our heart rate at rest - and the variability between beats - can tell us a lot about how well that training is working. Mac and Ginger go deep into the science so you know what to pay attention to and why, when you're ready for more work and when it's time to back off.

**Learn more:**

https://www.wahoofitness.com/blog/everything-know-heart-rate-training/

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