Hi everyone!!! This Jana again

Hello again. I have a question about calories-

Does ANYONE know a device----that accurately calculates how
Many calories you burn when you are performing a cardio or resistance work out?


This is important to me. I don't want to over eat more calories then I actually burn.

If anyone can help out, that would mean a lot----thank you


List the best brand, price, wherei can get it from, etc!!'nnn