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A runner’s guide to understanding heart rate variability | Canada Voices

Open this photo in gallery:HRV is one of the key metrics wearables use to determine a runner’s overall ‘readiness’ score.doble-d/Getty ImagesHeart rate variability has become one of the more curious metrics to emerge from the age of wrist-worn running trackers that, if read properly, can be a nifty training insight.HRV is one layer of complexity beyond heart rate. At its simplest, it measures the tiny fluctuations in time between heartbeats.A person with a high heart rate variability is able to withstand an elevated heart rate during exercise and a comparatively low heart rate while resting. That is a good thing…

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