Vital Signs & Wearables

Heart rate, HRV, blood oxygen and pressure — and how to connect your watch to Nuya.

5 articles

Resting heart rate: what's normal and what changes it

Your resting heart rate is how many times your heart beats per minute when you're still and calm. There's no single magic number that fits everyone: it shifts with age, fitness, sleep and even your morning coffee. What matters most isn't hitting a value from a chart, but knowing your own baseline and watching how it changes over time.

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Heart rate variability (HRV): what it is and why it matters

Heart rate variability, or HRV, is the tiny difference in time between one heartbeat and the next. It may sound odd, but a healthy heart doesn't beat like a perfect clock: those fine variations say a lot about stress, rest and recovery. HRV is very personal and makes more sense read as a trend over time than as a single number.

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Blood oxygen (SpO2): what the number on your watch means

SpO2 is an estimate of how much oxygen your blood is carrying, shown as a percentage. On the wrist, this number is meant for wellness and curiosity, not medical use: it gives a general sense, but several things can throw off the reading. It's worth understanding what it shows, what can confuse the sensor, and when it's better to talk to a professional.

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Blood pressure: how to measure well and understand the numbers

Blood pressure shows up as two numbers, and each one tells part of the story of how your blood circulates. Measuring well makes all the difference: rest, posture and timing change the result a lot. And a single reading is almost never a verdict; what really matters is the pattern over time.

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How to connect Apple Health and your watch to Nuya

Connecting Apple Health and your watch to Nuya brings together, in one place, the signals that today are scattered across apps and devices. You stay in control: you choose what to share and can change your mind whenever you want. The result is simple: loose numbers become a clear view of your health, explained in an easy way.

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