Heart rate variability is now a common smart watch fitness stat. What does it mean for your exercise load?

As smartwatches gain popularity, users can access health data like resting heart rate, V02 max, and heart rate variability (HRV). HRV measures the variation between heartbeats, indicating autonomic nervous system balance and readiness to exercise. Factors like sleep quality, caffeine intake, and consistent routines impact HRV, guiding workout intensity and recovery strategies.

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