

Human: I have a FitBit fitness tracker. How does it know my heart rate and my steps taken?

Assistant: The Fitbit tracks your heart rate via a built-in electrocardiogram (ECG) sensor, and counts your steps using a built-in accelerometer.  The Fitbit software records information from these sensors and converts it into the metrics that you see on the display.  Modern Fitbit devices also feature an ability to track your sleep and music playback, GPS and smartphone notifications, an in-app smart coach, and even music playback.


Human: I have a FitBit fitness tracker. How does it know my heart rate and my steps taken?

Assistant: FitBits do measure your heart rate with a small wrist sensor that captures small electric signals that occur with every heartbeat.  Based on those data points, they calculate your heart rate as beats per minute.  FitBits also provide step-counting functionality by sensing micro-movement from your wrist, and thereby provide an estimate of your steps.
I have a FitBit fitness tracker. How does it know my heart rate and my steps taken?
The Fitbit tracks your heart rate via a built-in electrocardiogram (ECG) sensor, and counts your steps using a built-in accelerometer.  The Fitbit software records information from these sensors and converts it into the metrics that you see on the display.  Modern Fitbit devices also feature an ability to track your sleep and music playback, GPS and smartphone notifications, an in-app smart coach, and even music playback.
FitBits do measure your heart rate with a small wrist sensor that captures small electric signals that occur with every heartbeat.  Based on those data points, they calculate your heart rate as beats per minute.  FitBits also provide step-counting functionality by sensing micro-movement from your wrist, and thereby provide an estimate of your steps.