Calculating calories burned.
When calculating the calories I've burned in one day, do I:
1) add my exercise on top of my BMR (e.g. 2,400 + 1,000), or
2) add the exercise to my BMR minus the time I was exercising, let's say two hours and assume my BMR gets rid of 100 calories/hour (e.g. (2,400-200) + 1,000).
Or, phrased another way: Let's say I burn 100 calories/hour normally throughout the day for 22 hours, and 500 calories/hour when exercising for two hours. Should I count all 24 hours of BMR plus exercising, or 22 hours BMR plus exercising?
I can't put this into words well, but hopefully you all understand what I'm getting at. Thanks.