Livity Blog

Health insights
from the Livity team

Deep dives into sleep science, HRV, fitness age, and the metrics that actually matter for your long-term health.

How Much Sleep Do You Need? Hours, Quality, and Tips

You've probably heard you need 8 hours of sleep. But the real answer is more nuanced — and the hours are only half the story.

Your heart doesn't beat like a metronome — and that's a good thing. HRV reveals more about your body than your heart rate alone ever could.

Apple now gives your sleep a number — but what does it actually measure? Here's how the Apple Sleep Score works and what you can do to improve it.