Heart rate variability measures the fluctuation in the time intervals between adjacent heartbeats, varying depending on a number of factors. Scroll down to read this post written by Marc Lindsay for the Polar Blog, on April 4, 2023. What if every morning when you wake up, your body could tell […]
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Today was not a good day for me to work out. Each morning, before anything else, I do a Polar orthostatic test with my Polar V800 and then I do a heart rate variability test with the Elite HRV app. Today I was a “5” with abnormally elevated parasympathetic activity. […]