Inspire 3 is tracking the wrong distance when using a treadmill

[Anapaulauro]

My Fitbit says I ran 7.7km in 45 minutes when I did 45 minutes at a 7.5kmph speed how is that even possible. My threadmill said I ran like 5.7km

Moderator Edit: Clarified subject

[MarreFitbit]

Hi there, @Anapaulauro. Welcome to the Fitbit Community Forums. Thanks for bringing this to my attention. I understand your concern, I will do my best to help you with this!

Is this the first time that your distance seems to be off? Did you try any other exercise besides the treadmill to see if the distance is still innacurate? Are you using the Treadmill exercise mode on your Inspire 3? If so, please know it will use the Walking Stride Length and not the Running Stride Length for calculating distance from the number of steps. This will cause the distance to be off substantially. So, if you are running on the Treadmill, it is better to use the Run exercise mode, assuming you have correctly set up the stride lengths for Walk and Run. However, keep in mind that it is important that your arms swing freely in order for the Inspire 3 to count steps, and not held next to the body.

Also, please note that your Fitbit device may not detect the number of steps if your arm is not moving. If you walk with a normal arm swing on the Treadmill, it should count the proper number of steps and calories. Take a look at the article How does my Fitbit device calculate my daily activity?