Does bmr drop as you loose

NovusDies

jungkooksdonut17 wrote: »

yes, definitely, since your BMR is a calculation between your age, height and weight, when one variable changes, it will increase/decrease depending on which direction it changed. I've lost 7 pounds so far using MFP and my BMR dropped from 1800 to 1200 already.

The BMR loss from your actual weight reduction is likely around 3 calories. The reduction from being in a deficit is not a number I know but most people barely notice it is happening. It is a conservation of energy so things like hair and nails grow slower and your extremities may feel uncomfortably cold at times. A sudden 600 calorie reduction in BMR would be a significant shutdown of body function.

If you put your numbers in and it suddenly dropped your calorie allowance you should go back through the guided set-up and let it calculate it again. Make sure your rate of loss has not changed. Occasionally someone reports a bug that involves an odd calorie goal. This may have happened to you.

Onedaywriter

MFP drops my calories required by approx 10 cals/lb recently- I weigh approx 200 give or take. That includes BMR and being “slightly active”.
So if you’re using the MFP app there’s no need for separate calculations. It also adjusts my calorie burn for exercise slightly downward.

lgfrie

TDEE decreases 4.5 - 5.5 calories per pound lost, as you can check by going to www.tdeecalculator.net. Put in your weight, get your TDEE, then decrease your weight by 10 pounds and see what the impact is on TDEE. It'll be around 50 cals lower, give or take, depending on your age/gender/weight/etc. Increase your weight 10 pounds and it'll go up around 50 calories.

Since TDEE is just a simple formula which multiplies BMR by a fixed coefficient based on your activity level (e.g. 1.2, 1.4, etc) then BMR, too, reduces by a similar (though slightly less) amount per pound list.

For instance, let's say your BMR is 2000 and your TDEE is 2400. if you're sedentary, TDEE = 1.2 * your BMR. Now let's say you, a sedentary person, lose 10 pounds. Your TDEE will reduce by around 50 calories, to 2350. But what will your new BMR be, given that TDEE? 2350/1.2 = 1958. Notice that that is a 4.2 calorie per pound reduction in BMR, not 5 calories like with the TDEE.

I think it's safe to say 4 calories per pound is a reasonable guesstimate of BMR reduction through weight loss, just as 5 calories per pound is a reasonable guesttimate for TDEE reduction.

This leaves open the question of why focus on BMR at all. TDEE is much more useful to a dieter; BMR is a theoretical construct, a baseline statistic used to calculate your daily energy burn by multiplication against an appropriate coefficient - which leaves you with TDEE. Only people in comas need be concerned with BMR; everyone else is burning more calories per day.