What Your Wearable’s HRV Number Actually Means
Why RMSSD and SDNN aren’t the same, how PPG compares to ECG, and how to use your own HRV baseline and trends instead of chasing someone else’s number.
Why RMSSD and SDNN aren’t the same, how PPG compares to ECG, and how to use your own HRV baseline and trends instead of chasing someone else’s number.