how does fitbit calculate lifting weights?

[171]

It doesn't look like I get Fitbit "credit" when I lift weights...only when I do aerobic activities.

[SteveH]

The problem with fitbits is that they are pedometers and are designed to track steps. They assume that anything we do is either walking or running and assign calories, active minutes etc accordingly. If it does track some steps from your lifting the calories and active minutes are likely to be inaccurate.

The way round this is to tell fitbit that you are not just walking or running and you do this by manually logging the activity. 

https://help.fitbit.com/customer/portal/articles/413311

[171]

Thank you for this explanation. Very helpful.