AI that understands human biology
Bringing this technology to your wrist is the result of years of breakthrough AI research. Traditionally, teaching AI required experts to manually analyze and label thousands of hours of sensor data. Instead, we developed advanced AI models that taught themselves human biology by observing sensor data from millions of opted-in users across billions of minutes of everyday life.
The result is a state of the art sensor model that deeply understands how the human body works and can even fill in the blanks when your device misses a beat or captures incomplete data.
Products backed by research
Every Health Guardian feature has undergone thoughtful clinical validation with gold-standard ground truth devices and measurement protocol, incorporating feedback from the scientific community. For example:
- Insulin resistance trends are built with our latest large sensor foundational model, which is pretrained on over one trillion minutes of data from 5 million opted-in users. An article speaking to their accuracy, which was validated by standard clinical blood tests, was published in Nature.
- Blood pressure trends are built on WavesFM, a foundation model trained on billions of minutes of raw heart and movement data. The data was validated across a diverse range of people and by a Fitbit Hypertension Labs study.
A smarter approach to health and longevity
By powering Health Guardian features with advanced AI, we’re laying the foundation for a new wave of health insights. Moving forward, these models and advancement will allow your wearable to catch more subtle changes early, helping you take proactive steps toward a longer, healthier life.
