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Heart Rate Variability (HRV) – Is the Hype Justified?

Pietari Nurmi

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Heart Rate Variability (HRV) – Is the Hype Justified?

Most sleep and activity trackers measure heart rate. Many also report something called “heart rate variability” or HRV. What on earth is…

Heart Rate Variability (HRV) – Is the Hype Justified?

Most sleep and activity trackers measure heart rate. Many also report something called "heart rate...

How to Optimize Physical Performance by Sleeping

There is a two-way connection between sleep and exercise. Physical activity improves sleep...