100 lb. Club - BMR & Calorie needs?

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05-08-2008, 08:38 PM
I was thinking about the post Jen put up regarding maintenance calories. I was thinking...I don't really know how many calories I should be eating to lose. I just kind of picked a number that sounded good. I am following South Beach but also watch my calories. I know what my BMR (1906.4 & calories to maintain my weight now - 2621) is but I am kind of lost as to how to figure out how many calories I need to eat to burn a certain amount of lbs. Can someone who understands it help me. I just don't know what do with those numbers. :?:

05-08-2008, 09:17 PM
Absolutely. First you decide how much you want to reasonably lose a week. Say it's 1.5 lbs. At 3500 calories a pound, that works out to a 5250 calorie deficit a week, or 750 a day. If between resting BMR and exercise you burn 2500 calories a day, you'd need to eat (2500-750) or 1750 calories a day. If you exercise more, you eat more to maintain the same level of deficit. If you want to lose more, you have to increase the deficit.

Does that make sense?

05-08-2008, 09:24 PM
The best thing to do with the numbers is to ignore the numbers. :)

It's impossible to accurately assess either your BMR or the calories you burn (through exercise and daily living) unless we put you in a lab for several weeks, hook you up to a machine that measures your O2 consumption, and measure all your intake and output. All the calculators are just guesses and averages and may be completely off-base for you.

You did the right thing by picking a reasonable calorie level and trying that out. If you're losing 1 - 2 pounds a week, then you know it's the right level for you. It's that easy!