HRV & scores
8 guides on hrv & scores with Heart Rate & Health - Novaz.
What is heart rate variability (HRV)?
Heart rate variability is the small difference in time between one heartbeat and the next. Here's what it tells you about recovery and stress — and what it doesn't.
RMSSD, SDNN and pNN50 explained
Three common ways to put a number on heart rate variability. What each one measures, and which one to watch day to day.
What is a good HRV?
There's no single good HRV number. Typical adult RMSSD sits roughly between 15 and 75 ms — but your own trend matters far more than anyone else's figure.
How the Heart Score works
The Heart Score is one 0–100 number built from four parts: resting pulse, RMSSD, SDNN and stress. Here's how it's weighted and what the bands mean.
What does the stress level mean?
The stress index runs from 0 to 100 and is read from your beat-to-beat variation. Here's what calm, mild tension and high stress mean — and how to bring it down.
What does the energy level mean?
Energy is a 0–100 estimate of how ready your body is for load right now, read from your pulse and variability. Here's how it's calculated.
What is heart age?
Heart age compares your resting pulse and variability with what's typical at your age, and expresses the gap in years. An indicator of habits, not a medical assessment.
How breathing rate is read from your pulse
Breathing leaves a trace in your pulse: beats speed up slightly as you breathe in and slow as you breathe out. Here's how the app counts breaths from it.