My Charge 3 is not tracking cardio when I use elliptical machines

[Rubygloommel]

Hi, I'm having issues where my charge 3 doesn't record cardio when I use elliptical machines, step machines, etc. It's fine for walks or if I use my dance mat, but just never recognises when I've gone to the gym. I know you can tell you Fitbit when to start recording but the only options are walk, run, swim, weights, treadmill, and bike - none of which seem appropriate. Any advice?

Moderator edit: updated subject for clarity

[EdsonFitbit]

Welcome to the Fitbit Community @Rubygloommel.

I'm sorry to hear that you are having difficulties to register your heart rate. Thank you for the information provided.

You can add more exercises to your current list, including elliptical. For instructions to add more exercises to your Fitbit Charge 3 please visit this article. 

Please make sure you are following these recommendations to get accurate heart rate readings during your exercises. 

If you have any question, please let us know.