The science · Heart rate
Track your heart rate, day and night
Sleep, stress, exercise, even a hot day: it all shows up in your heart rate. Bionny follows it day and night and turns it into patterns you can actually read.
What the band tracks
Why heart rate is worth tracking
In adults at rest, heart rate typically falls between 60 and 100 beats per minute, and it tends to be lower in people who are fit and during sleep. Heat, emotions, posture, caffeine and some medicines can all push it up or down 1.
Your resting heart rate is one of the most useful numbers to follow. It reflects your cardiovascular fitness, and in large studies, each additional 10 beats per minute at rest was linked to a higher long-term health risk 2. A slow drift down over weeks is often a sign that regular activity is paying off. During workouts, zones based on your maximum heart rate, first estimated from your age 3, help you train at the right intensity.
Heart rate questions
Can I check my heart rate at any time?
Yes. Start a live reading from the app and you get a value in a few seconds.
Why is my heart rate lower at night?
During sleep your body is fully at rest and your nervous system slows your heart down. That’s why Bionny measures your resting heart rate at night.
Why does my resting heart rate change from day to day?
A short night, alcohol, a hard workout, stress or the start of a cold can all raise it for a few days. Look at the trend over weeks.
Is Bionny a medical heart monitor?
No. It shows wellness trends, not a diagnosis. If your heart rate feels unusually fast or slow, or you have symptoms, speak to a healthcare professional.
What’s the difference between heart rate and resting heart rate?
Your heart rate changes throughout the day as you walk, climb stairs, or experience stress. Your resting heart rate is the lowest heart rate recorded over a 15-minute period while you sleep, when your body is fully at rest. You get one value per night, making it a particularly useful metric for tracking your fitness over time.
Sources
- American Heart Association. All About Heart Rate (Pulse). heart.org
- Zhang D et al. (2016). Resting heart rate and all-cause and cardiovascular mortality in the general population: a meta-analysis. CMAJ.
- Tanaka H et al. (2001). Age-predicted maximal heart rate revisited. Journal of the American College of Cardiology.
Bionny is a wellness device. It is not a medical device and is not intended to diagnose, treat, cure or prevent any disease.
What Bionny tracks
Blood pressure
Optical, cuff-free estimates throughout the day or on demand, so you can follow changes over time.
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HRV
Small differences in the timing of heartbeats, tracked by your band and compared with your personal baseline.
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Stress
A daily stress score in three levels, along with your calmer moments.
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Activity and Strain
Steps, calories, daily goals, over 127 sports and your daily Strain score.
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Recovery
A morning overview of your recovery, based on overnight HRV, resting heart rate and sleep.
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Sleep
Light, deep, REM and awake time, a nightly Sleep Score, efficiency and regularity.
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Blood oxygen
SpO₂ readings day and night, summed up in a daily value.
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Bionny Age
An estimate based on your activity, resting heart rate and sleep, updated every two weeks.
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