Introducing PrimalBeat HRV

Regular Mark’s Daily Apple readers know of my enthusiasm for the cutting edge biofeedback technology known as heart rate variability (HRV). There is a detailed introductory post here, and a follow up post here. In short, HRV measures the variation in beat-to-beat intervals of your heart, providing a direct window into the functional state of your […]

from Mark's Daily Apple http://ift.tt/1PmFkL3

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