Calorie Counting or Low Calorie Dieting
Basic Principle of Calorie CountingThere
is a balance between how much energy our bodies use and how much energy
we take in by eating. This energy is measured in calories. When we eat
more calories than our bodies burn, we store it as fat and end up
gaining weight. When we burn off more calories than we take in, our
bodies used the stored energy in fat, and we lose weight.

It is that simple. In order to lose weight, we need to take in fewer calories and burn off more. Controlling Your Calorie Intake By
keeping up with your daily calorie intake (i.e. calorie counting), you
can take control of how many calories you eat. This will help you shift
the balance in favor of weight loss. A food journal is just a
place you write all of this down. It can be as simple as a small
notebook or as sophisticated as a software program on a hand held PDA. You might be surprised by how many calories are in different foods.
Energy density
defines how many calories are in a certain amount of food. Low calorie
foods are less energy dense than high calorie foods. When we eat a
meal, we tend to eat the same volume of food at breakfast, lunch, and
dinner. By
calorie counting, you eat the same amount of food, but you eat low
energy density rather than high energy density foods. This will cause
you to take in fewer calories. You can find out how many calories are
in foods by looking at the
food labels
on packages, on restaurants’ web sites, or in their brochures. There are also several
web sites
that have references for the amounts of calories in foods.
There is a collection of people who have lost 30 pounds and kept it off for at least one year. It is called the
National Weight Control Registry (NWCR).One
thing these people did was become aware of foods’ calorie values. They
also ate certain types of foods in moderation rather than completely
cutting them out of their diets. They were able to include their
favorite foods rather than having to fight temptation. By calorie
counting, you are in control of what you get to eat.
How Many Calories Should I Eat? Everyone
is different, and it is difficult to exactly predict how many calories
a person needs every days. There are several methods to estimate how
many calories you need. One way is to use the Harris-Benedict equation:
For women, use: Resting Energy Expenditure (REE) = 655 + 9.5x(weight in kg) + 1.9x(height in cm) – 4.7x(age in years) For men, use: Resting Energy Expenditure (REE) = 66 + 13.8x(weight in kg) + 5x(height in cm) – 6.8x(age in years) You then need to take your REE and multiply it by your activity factor. Your
activity factor (AF) = 1.3 for a sedentary lifestyle, 1.5 for some
regular exercise, or 1.7 for regular activity or a physically demanding
job. Your body’s daily calorie need = REE x AF |
Instead of having to do all the math, you can use this online calculator that will estimate the amount of calories you use daily. The average adult is somewhere around 2000 calories. The
more active you are, the more calories your body will burn. There are
other factors too. Men of the same size will lose more weight than
women. (Sorry ladies) Younger people use more calories than older
people. Our bodies’ metabolic rates decline about 2% every 10 years. In
addition, calorie counting at a younger age will help develop healthy
habits for later in life. (Do not use the above information for
children. Caloric intake for your child should be discussed with your
pediatrician.) Having a negative
calorie balance of 500 to 1000 calories per day should cause you to
lose about 1 to 2 pounds per week. This means subtract 500 to 1000 from
the daily calories you calculated above, and this should be your target
staring point of how many calories to eat each day. At this rate,
weight loss is easier to sustain. In fact after one year, people on
moderate calorie reduction lost just as much weight as people on very
low calorie diets. For example, a
person who needs 2000 calories per day can eat 1000 to 1500 calories
per day. After one year, they will have lost 52-104 pounds. Of course,
everyone is different. You may need to make adjustments to your daily
calorie goal to get a 1-2 pound weight loss each week.
For tips on calorie counting, click here.
There are several programs
that are based on calorie counting. Some have variations on this theme.
Weight Watchers, Jenny Craig, and LA Weigh Loss are programs to help
you stay in control of what you eat and offer support.
Return to
Diets
or the
Home Page.
It is important you
discuss any weight loss or exercise plan with your doctor. Only you and
your physician can decide what is best for you. Some people have
certain conditions that prevent them from doing all exercises, and goal
body weights may be different for different people. You need to discuss
all these things with your physician before starting any weight loss or
exercise program.
This
article was written by
John
Vickery, MD.
References
“Dietary therapy for obesity” Up To Date version 15.3 Prim Care Clin Office Pract 2003;30:301-316 The American Journal of Clinical Nutrition 2003;77:639-645

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