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I found this online today and thought it was very interesting so I wanted to share it:
"Your basal metabolic rate (BMR) is the amount of energy your body needs to function at rest. This accounts for about 60 to 70 percent of calories burned in a day and includes the energy required to keep the heart beating, the lungs breathing, the kidneys functioning and the body temperature stabilized. In general, men have a higher BMR than women. One of the most accurate methods of estimating your basal metabolic rate is the Harris-Benedict formula:
So what happens if you take in more or fewer calories than your body burns? You either gain or lose fat, respectively. An accumulation of 3,500 extra calories will be stored by your body as 1 pound of fat -- fat is the body's way of saving energy for a rainy day. If, on the other hand, you burn 3,500 more calories than you eat, whether by exercising more or eating less, your body converts 1 pound of its stored fat into energy to make up for the deficit.
3500 calories = 1 pound of fat
One thing about exercise is that it raises your metabolic rate not only while you're huffing and puffing on the treadmill, but also for hours and days afterwards. Your metabolism takes a while to return to its normal pace. It continues to function at a higher level; your body burns an increased number of calories for about two hours after you've stopped exercising. This means that even just sitting doing nothing you will burn more calories.
As a general rule of thumb if you have a normal lifestyle you can take in about 10-11 calories per pound of body weight to just maintain your weight...not increase or decrease. So if you weight 130 lbs. and you eat about 1300-1430 calories a day, your weight theoretically should not fluctuate too much. If you weigh 180 lbs. you can eat 1800-1980 calories a day to stay about the same weight. Of course, other factors come into play. Men vs. women, activity levels, hormonal disease such as hypothyroidism or diabetes, and your own genetic tendency to either burn or store fat easily".
"Your basal metabolic rate (BMR) is the amount of energy your body needs to function at rest. This accounts for about 60 to 70 percent of calories burned in a day and includes the energy required to keep the heart beating, the lungs breathing, the kidneys functioning and the body temperature stabilized. In general, men have a higher BMR than women. One of the most accurate methods of estimating your basal metabolic rate is the Harris-Benedict formula:
- Adult male: 66 + (6.3 x body weight in lbs.) + (12.9 x height in inches) - (6.8 x age in years)
- Adult female: 655 + (4.3 x weight in lbs.) + (4.7 x height in inches) - (4.7 x age in years)
So what happens if you take in more or fewer calories than your body burns? You either gain or lose fat, respectively. An accumulation of 3,500 extra calories will be stored by your body as 1 pound of fat -- fat is the body's way of saving energy for a rainy day. If, on the other hand, you burn 3,500 more calories than you eat, whether by exercising more or eating less, your body converts 1 pound of its stored fat into energy to make up for the deficit.
3500 calories = 1 pound of fat
One thing about exercise is that it raises your metabolic rate not only while you're huffing and puffing on the treadmill, but also for hours and days afterwards. Your metabolism takes a while to return to its normal pace. It continues to function at a higher level; your body burns an increased number of calories for about two hours after you've stopped exercising. This means that even just sitting doing nothing you will burn more calories.
As a general rule of thumb if you have a normal lifestyle you can take in about 10-11 calories per pound of body weight to just maintain your weight...not increase or decrease. So if you weight 130 lbs. and you eat about 1300-1430 calories a day, your weight theoretically should not fluctuate too much. If you weigh 180 lbs. you can eat 1800-1980 calories a day to stay about the same weight. Of course, other factors come into play. Men vs. women, activity levels, hormonal disease such as hypothyroidism or diabetes, and your own genetic tendency to either burn or store fat easily".
...Was in HEAVEN -got to 150, for awhile, then got too busy, and gave in too much... and... OK holding pattern "keep it together..." 
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