Does anyone know how many calories are burned when doing High Intensity Interval Training? Do you know how to track it on the fitness tracker? I have just started doing them and I have just been putting it under circuit training.
I don't have a Heart Rate Monitor. I am unemployed and can not spend the amount of money it cost to buy one. I know you need to take you beats per min when working out, but what is a formula to use to calculate calories burned?