| Adding the thermic effect of food? |
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Ezzie
New Member
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Posted: 19 Jul 2009 11:59 pm |
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When you go by the activity calculator, it only accounts for calories burned doing that particular activity. Do you add the 10% for the thermic effect of food to get your total calorie burn?
For example, say without eating I burn 1,590 through daily activities. But let's say I eat 1,400 calories. Initally...
1,590 - 1,400 = 190 deficit
But if I add the 10% for digestion, it's:
1,590 + 140 = 1,730 - 1,400 = 330 deficit
That's kind of a big difference.  Hope someone can clear that up for me!
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Nir
Senior Administrator
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Posted: 20 Jul 2009 06:59 am |
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If you use the activity calculator (the one where you enter every activity for a 24 hour period) then the way it works things out is a bit rough. It uses the MET system. It does not factor your gender, age or height into the equation - it just multiplies your weight by a fixed factor (factor is different for each activity). (And overweight people find that these numbers are over-estimates of calories burnt.)
If however you are using the BMR/RMR calculators, notice that the unadjusted figure does not include the thermic effect of food, but the one that is adjusted (even for 'sedentary' activity) includes the thermic effect of food. (part of that 1.2 multiplier is for TEP).
Please remember that all formulas and calculations are just estimates and approximations and that there is variability (two people of the same weight, height, age and gendar may burn different amounts of calories) so the only sure way of figuring out whether your deficit is 100 or 300 is to try it out and see how much you've lost (over a number of weeks). Look at real-world results and tweak your exercise and intake accordingly.
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Ezzie
New Member
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Posted: 20 Jul 2009 11:49 am |
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I'm actually using my HMR as an experiment. I've found that for just sitting around, the calculator here is much less than my HMR. My monitor includes my information such as weight, gender, height, and age. I think it may be more accurate for these reasons.
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