So how did you do with your food diary? I hope that you were able to learn something about what you eat, when you eat, why you eat (not just because you’re hungry, right?), and what you are doing well and where you could improve. Now that you are getting a grip on what you are eating, let’s talk a bit about how much you should be eating. This is the next step in any health and fitness goals supporting or sabatoged by food.
There is no magic quantity of food that is right for everyone. While counting calories is not something that everyone will want to practice, it is the best, most straight-forward, and most accurate tool for determining the right quantity of food for each person. The bad news is that it involves some math and actually counting every calorie that you consume. The good news is that you only need to do the math once, and you only need to count calories meticulously for about two weeks in order to gain a basic understanding of the amount of calories you need. Plus, since our diets are generally repetitive, after a few weeks of counting, you will be able to accurately estimate the number of calories in most of your foods.
So how do you Estimate Your Caloric Needs?
Using the Harris-Benedict principle, you can estimate your BMR, or basal metabolic rate, which is the amount of energy that your body needs to function. This number is influenced by the number of calories needed for basic bodily functions, and by height, weight, age, and gender.
Using this number, you can estimate your daily caloric needs in order to maintain your current weight.
Calculate your BMR
Women:
655 + (4.3 x weight in pounds) + (4.7 x height in inches) – (4.7 x age in years)
Men:
66 + (6.3 x weight in pounds) + (12.9 x height in inches) – (6.8 x age in years)
When I do this calculation, I get 1347.6 as my BMR.
Now Calculate Your Activity Number.
If you are sedentary: BMR x 20 percent
If you are lightly active: BMR x 30 percent
If you are moderately active (exercise most days a week.): BMR x 40 percent
If you are very active (exercise intensely on a daily basis or for prolonged periods.): BMR x 50 percent
If you are extra active (hard labor or are in athletic training.): BMR x 60 percent
I do two calculations because some weeks and months I am lightly active and others I am moderately active. My two numbers are 404.28 (1347.6 x 0.3) and 539.04 (1347.6 x 0.4).
Add this Activity Number to your BMR. When I add these numbers to my BMR, I get approximately 1750 and 1885.
The result of this formula is the number of calories you can eat every day and maintain your current weight. If you want to lose weight, then you will need to either reduce your caloric intake, or burn more calories by exercising, or both. So, for me, based upon the Harris-Benedict calculation, in order to maintain my weight, I want to eat between 1750 and 1885 calories per day.
Of course, this is only one method of calculating caloric intake. There are many online calculators as well. For example, there is a great, and simple, online calculator at www.shapefit.com. When I enter my information (gender, height, weight, age, activity level), I get 1995 per day for weeks that I am moderately active and 1725 per day for weeks that I am lightly active. I can average those out to approximately 1850 calories per day and try to stay within 150 calories on either side of that number.
There is a similar online calculator at www.NutritionData.com that gives me a number of approximately 2100 calories. And another one at www.CalorieKing.com that calculates my daily caloric intake at 1625.
Then Experiment! With all these differing numbers, how do you know which number is the right one for me? Experimentation. I have to try out the varying amount of calories over the course of a few weeks and see how it makes me feel, and if I gain, lose, or maintain weight. I have done this and know that if I eat 2100 calories per day, I gain weight, but if I only eat 1625 calories, I am hungry, tired, and lose weight. Between 1750 and 1900 calories per day works for me as a maintenance diet.
Experimentation is what you need to do as well. Use the Harris-Benedict calculation or the online calculators as a guide on where to start in determining the right quantity of food on a daily basis for your body, metabolism, and lifestyle. Keep up your experiments for two weeks. Then we’ll discuss how the kinds of foods you eat can help you reach your goals without feeling deprived or hungry!
Like this:
Like Loading...
Read Full Post »