Why Overexercising Drops Your HRV and What It Really Means for Recovery and Fitness
What HRV Is and Why It Is Not Just a Wearable GimmickHeart rate variability measures the millisecond-level variation between consecutive heartbeats. A heart beating at 60 beats per minute is not ticking once every exact second, the gaps between beats fluctuate constantly, and that fluctuation is HRV. Higher variability means…
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