Understanding Your HRV (Heart Rate Variability)

HRV is one of the most useful metrics your HLTH Band tracks, but it can be confusing. Here's a simple guide to what it means and how to use it.

What Is HRV?

Heart rate variability (HRV) is the small variation in time between your heartbeats. Your heart doesn't beat like a metronome. The gaps between beats change slightly all the time, and that variation is your HRV.

A higher HRV generally means your body is well recovered and your nervous system is flexible and responsive. When you're stressed, tired or unwell, the gaps between beats become more even, and your HRV tends to drop.

Think of HRV as a guide to how well your body is recovering.

How Your Band Measures HRV

Your band measures HRV mainly while you're resting and asleep, when there's less movement to interfere with the reading. Wear your band overnight to get the most HRV data.

No HRV data? HRV monitoring may need to be switched on in the QWatch Pro app before it starts recording.

Where to Find Your HRV Data

Open the QWatch Pro app and go to the HRV section. HRV is shown in milliseconds (ms).

Apple Health: HRV readings stay in the QWatch Pro app. They don't currently sync to Apple Health.

HRV Reference Ranges

The app uses these general reference ranges:

• Low (below 30 ms): may suggest higher strain or less recovery
• Normal (30–60 ms): a typical balance between stress and recovery
• Good (61–101 ms): strong recovery
• Excellent (above 101 ms): very high variability, often seen during deep recovery

HRV varies a lot from person to person. It naturally decreases with age, and your baseline is partly down to genetics. So what matters most is your own normal range and how it changes over time, not how your number compares with anyone else's.

What Affects HRV?

Things that can lower your HRV:

• Poor or too little sleep
• Alcohol, especially close to bedtime
• Hard training without enough rest
• Illness
• Stress
• Dehydration

Things that can help raise your HRV over time:

• Regular, good-quality sleep
• Regular aerobic exercise, balanced with rest
• Managing stress
• Staying hydrated
• Slow breathing exercises

Changes to your habits usually take weeks to show up in your HRV, not days.

How to Use Your HRV Data

Don't focus on single readings. HRV naturally goes up and down from day to day. One low reading doesn't mean something is wrong.

Look at the trend over 1 to 2 weeks. HRV that keeps falling, especially alongside a higher resting heart rate and poor sleep, can be a sign your body needs more rest. HRV that rises over several weeks is a good sign your recovery is improving.

Ways to use it:

• If your HRV is much lower than usual before a hard workout, you might choose an easier session or a rest day
• If your HRV stays low and your resting heart rate is rising, focus on sleep and recovery before pushing harder
• Look at your HRV alongside your sleep and stress data for the fullest picture

Why Doesn't It Match My Other Device?

Different devices measure HRV at different times and in different ways, so the numbers won't match exactly. Compare your HLTH Band readings with each other over time, rather than with another device.

Important

Your band's HRV data is designed for everyday wellness tracking. It varies naturally between people and should be compared with your own baseline. It can't diagnose any condition and shouldn't be used to make medical decisions.

Still have questions? Email us at info@hlthtrack.com.