The science · Stress

See how your day really went

Some days feel heavier than others. Bionny shows when your body was under pressure and when it found calm again, so you can make more room for what helps you unwind.

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Woman working on a laptop next to the Bionny stress screen

What the band tracks

Bionny app: time spent at each stress level

Woman relaxing in bed next to the Bionny stress card

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Why stress is worth tracking

Stress is the body’s response to a demand, physical or mental, whether it lasts a moment or keeps going for weeks ¹. Short bursts are a normal part of life; it’s stress that never lets up that weighs on health. Under pressure, your heart tends to beat faster and your heart rate variability to fall ², and that’s what the sensor on your wrist picks up.

Exercise also speeds up your heart, so a workout can show up as a higher stress level: that’s physical effort, not worry. The goal isn’t a score of zero, but a day with enough calm moments to balance the busy ones.

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Woman stretching on a yoga mat next to the Bionny stress screen

Stress questions

Is this a mental health test?

No. It reflects your body’s physical stress response for wellness purposes. If stress feels overwhelming, talk to your doctor.

Why is my stress high during a workout?

Exercise raises your heart rate, which the band reads as stress. That’s normal.

Do I need to log anything?

No. Everything is measured in the background.

Sources

National Institute of Mental Health. I’m So Stressed Out! Fact Sheet. nimh.nih.gov
Kim HG et al. (2018). Stress and heart rate variability: a meta-analysis and review of the literature. Psychiatry Investigation.

Bionny is a wellness device. It is not a medical device and is not intended to diagnose, treat, cure or prevent any disease.