Tagged “HRV”

HRV, resting heart rate and temperatureWhat your overnight HRV, resting heart rate and skin temperature mean, what moves them, and why to compare them only with your own baseline.
- Evidence: Some
- Low effort
- Free
- Works: 1–3 weeks
Which habits change which metricA table of common sleep habits against the numbers your wearable shows, with the direction of each effect, how sure the research is, and where nobody has looked.
- Evidence: Some
- Low effort
- Free
- Works: tonight to 2 weeks
Breathing techniquesSlow breathing at about 6 breaths a minute reliably raises HRV while you do it. Evidence that it improves sleep is small but promising; 4-7-8 and box breathing have even less.
- Evidence: Weak
- Low effort
- Free
- Works: tonight