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Information on caloric needs

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Old 02-05-2003, 08:52 PM   #1
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http://howstuffworks.lycoszone.com/calorie3.htm

Your Caloric Needs
Just how many calories do our cells need to function well? The number is different for every person. You may notice on the nutritional labels of the foods you buy that the "percent daily values" are based on a 2,000 calorie diet -- 2,000 calories is a rough average of what a person needs to eat in a day, but your body might need more or less than 2,000 calories. Height, weight, gender, age and activity level all affect your caloric needs. There are three main factors involved in calculating how many calories your body needs per day:
∑ Basal metabolic rate
∑ Physical activity
∑ Thermic effect of food
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)
(Note: The first number in the equation for females is, in fact, 655. Strange but true.)
The second factor in the equation, physical activity, consumes the next highest number of calories. Physical activity includes everything from making your bed to jogging. Walking, lifting, bending, and just generally moving around burns calories, but the number of calories you burn in any given activity depends on your body weight. Click here for a great table listing the calories expended in various physical activities and for various weights.
The thermic effect of food is the final addition to the number of calories your body burns. This is the amount of energy your body uses to digest the food you eat -- it takes energy to break food down to its basic elements in order to be used by the body. To calculate the number of calories you expend in this process, multiply the total number of calories you eat in a day by 0.10, or 10 percent.
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Old 02-05-2003, 09:17 PM   #2
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http://www.marathonguide.com/Fitness...loricneeds.cfm

this one is even better it gives the number of calories that are needed to sustain life that is ifyou were sitting all day and did nothing then this is the amount of calories you would burn, then add in your activities and you can have a good idea. of where you are and how many lbs you can lose. 3500 caloires in a lb

so remember that ifyou gain a few lbs in a day it is water there is no way you can eat 3500 caloire extra in a day unless you eat 3 times at McD's
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Old 02-05-2003, 09:43 PM   #3
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Thanks for posting this, Sue! Good stuff and in the right spot!
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