"“High” and “low” HRV is relative for each person. What is a high, low or normal HRV reading? A blog post on that subject by Oura, makers of the Oura Ring smart ring, which measures HRV during sleep to assess your readiness, offers an explanation: Diabetes, coronary heart disease and high cholesterol are things commonly tied to having a low HRV as well. So what does is mean to have a low or high HRV reading? There's no ideal HRV score, and like resting heart rate, it's hugely personal.īut generally speaking, high HRV as being associated with healthy longevity and the side of the nervous system that promotes relaxation, digestion, sleep and recovery.Ī low HRV reading is commonly associated with stress, overtraining, inflammation and illness. When you're working out, your HRV decreases as you heart rate and exercise intensity rises.īut it's not just about serious athletes, as HRV measurements have started to trickle down into devices like fitness trackers where it can also be used to check in on how stressed you are. So if you're a runner and you've just put in a tough 2-hour run, it'll be able to help you decide whether you're ready to go again the following day or whether you should take the day off from training. Unlike measuring heart rate, which is about the average number of heart beats per minute, HRV focuses on the small fluctuations of the heartbeat and usually measures that variation time in milliseconds. Heart rate variability is the measurement of the time interval between heartbeats. Here's what it means and why it's so important. In fact, of the new era of health insights on offer from wearables, HRV is at the heart of them all. It's a heart rate measurement that the likes of Fitbit, Garmin, Apple, Polar Samsung and others use to offer new insights such as stress, recovery, readiness and fatigue. But increasingly, heart rate variability (HRV) is the key metric. A built-in heart rate sensor is something we take for granted these days when we talk about wearables.Įvery smartwatch, fitness tracker and sports device has a built-in heart rate monitor, used for 24/7 monitoring and tracking workouts.
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