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Diet, Nutrition & Weight Loss
Reply to "HRV or Heart Rate Variability"
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[quote=Anonymous][quote=Anonymous]I study HRV. The gold standard to measure HRV is a 5 minute duration EKG. Longer would be even better. Most of these wearable devices are not approved by the FDA for measurement of HRV - so check that. Also HRV is dependent on position - sitting, standing, lying and also to stress, similar to how blood pressure is affected by these factors. Caffeine intake, sleep etc etc also affect HRV. Bottom line is most of these devices are not valid devices to measure HRV and there is a high probability that HRV is not measured under ideal circumstances.[/quote] What are you thoughts on the cardio fitness measure on the Apple Watch?[/quote]
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