Question about HRM Math

anna1m

so even while I am sitting on the couching watching tv I am burning calories required to live. When I work out, my HRM calculates how many calories I burning within that training period. Are the calories it is calculating while I am working out my regular calorie requirement for living plus the extra calories I am burning while training, or is it somehow calculating just the training calories.

For example, if I require 1800 calories to live and burn 300 calories while working out, is it :

1800-300 =1500 net
or
1800-300 = 1612.5 net since I would have burned 112.5 calories just sitting on my *kitten* anyway for the 1.5 hours

tigersword

The first one. The HRM guesstimates gross calorie burns, it doesn't subtract out BMR. They aren't really all that accurate anyway, so you're kind of over thinking it.