How does my Fitbit device calculate my burn?

[bohanvo2]

I have a three month old baby who only calms down when held while bouncing on an exercise ball. My Fitbit Luxe counts each bounce as a step and I "hit" around 20k steps a day because of this (from which actual steps taken is somewhere between). I wonder if this skews the daily energy expenditure (calories burned) my Fitbit shows me? Is it calculated based on heart rate only or are the steps included?

Moderator edit: updated subject for clarity

[RiekoC · Accepted solution]

Hello @bohanvo2 

I moved your post from the Charge 6 product help forum to the Luxe product help forum since that's the device you mention in your post.

According to this help page (<-- click), calories burned is based on your BMR and your activity, which includes heart rate.