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In
the Spotlight
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| February
10, 2000 |
No
Nonsense Guide To Nutrition, Exercise, And Weight Control: Putting
It All Together
By
David Cohen
Personal MD.com Medical
Contributor
Part
1: No
Nonsense Guide To Nutrition, Exercise, And Weight Control: The Problem
Part
2: No
Nonsense Guide To Nutrition, Exercise, And Weight Control: Nutrition
Part
3: No
Nonsense Guide To Nutrition, Exercise, And Weight Control: Exercise
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How
are you doing on your New Year's resolutions to eat better
exercise - lose weight? Well, if it's not going like you thought
it would, we would like to help.
In
the previous three articles, we have discussed "The Problem",
"Nutrition", and "Exercise". Now, in this article, we'll discuss
"Putting It All Together".
Determine
your ideal body weight
The first step to determining what your ideal bodyweight is
to have a bodyfat assessment done. Although people commonly
use weight charts to find their ideal body weight, these charts
are usually a poor choice. Most weight charts are based on actuarial
tables from insurance companies.
Actuarial
tables establish the risk of death from all causes at any given
age for different weights. Some of these tables now provide
weight ranges based on whether one possesses a large, medium
or small body frame and even though this is an improvement there
is still a measure of uncertainty.
To
categorize your build, the Sheldon somatotype classification
system is preferred over "frame size." This system categorizes
the human physique in three general categories:
-
Ectomorph.
This describes a tall, thin, bony type of person with small
joints, narrow shoulders, narrower hips, high metabolism,
and with little fat or muscle
- Mesomorph.
This describes a square, rugged person with medium to large joints,
broad shoulders, narrow hips, little fat, and plenty of muscle.
- Endomorph.
This describes a person who tends to gain weight easily and has
a rounded body shape with thick bones, short limbs, and a long
torso, with little muscle and plenty of fat.
Few
people are the extremes of any type and have characteristics of
two or ail somatotypes. Knowing your somatotype and bodyfat percent
can help determine your ideal body weight.
The
average American man is 5'10", weighs 175 pounds, and has 24
percent bodyfat. He has 133 pounds of lean body mass (LBM),
which is the part that burns calories. He also has 42 pounds
of fat.
An
ideal bodyfat percentage for men is generally considered to
be about 15 percent for non-athletes and 6 percent to 12 percent
for athletes. The average American woman is 5'3 ", weighs 135
pounds, and has 33 percent bodyfat.
Many
people who think they are overweight are actually over-fat and
under-muscled due to inactivity.
Decide
on a strategy
To
decide on a strategy for a weight loss or weight control program,
it's important to know that age, gender, size, somatotype, activity
level, and dietary habits influence the relative amounts of
fat, bone, and muscle
Although
we'll be using men to show the dynamics of eating, exercise,
weight, and body composition, the same principles apply to woman,
but they have the added complexities of female hormones and
the relationship between bodyfat, amenorrhea, and osteoporosis.
In addition, because women are generally smaller and have slower
metabolisms, dieting is more likely to result in nutritional
deficiencies.
Let's
take a look at three average men (Al, Bob, and Cal) who are
the same age, size, and body composition to see how their different
strategies work for them.
Al
decides he wants to lose 20 pounds. To do so, he severely
restricts his calorie intake and doesn't exercise. At best,
Al will lose equal amounts of fat and muscle, and may even
result in him losing only muscle and retaining the fat.
Bob
also decides to lose 20 pounds, but he doesn't restrict the
number of calories he takes in as much; instead, he regularly
does aerobic exercise.
Cal
decides his weight is fine, but he needs to firm up his body.
He reduces his calorie intake, but not severely. He also decides
to lower his intake of fat, sugar, and alcohol and replace
it with fruits, vegetables, and low-fat protein sources. He
varies between a moderate caloric deficit and a weight maintenance
calorie intake.
This
strategy prevents any decrease in metabolism due to his body
adapting to the lower calorie intake. He also does both strength
training and aerobic exercise regularly.
All
three men have decided on different weight control and exercise
strategies, but will the results be the same? The answer is
no. What happens is that although Al and Bob will lose weight
initially, when they go back to their "normal" diet (their former
maintenance calorie intake), they will, over time, regain the
weight they lost.
Whereas
Cal, now actually requires more calories to maintain his weight
than before he started his program. He also is stronger, more
flexible, has more endurance, and less vulnerability to injury
and a lower risk of chronic disease. In addition, he actually
measures smaller because muscle is denser than fat.
(One
pound of muscle takes up a lot less space than one pound of
fat.) Al and Bob are in the "yo-yo" dieting trap and will continue
to become fatter and heavier, unless they change to use the
same strategy as Cal eating better foods and doing varying
types of exercises.
What
is your strategy?
The American Heart Association recommends against very-low calorie
diets because research indicates that there is actually a higher
risk of heart attack to people who "yo-yo" up and down in weight
than to people who maintain their weight when obese. Very-low
calorie diets cause loss of heart muscle, which can't be regained.
Weight
loss and weight control are highly emotionally and culturally
charged subjects. There have been many different ideals of beauty
and health in history. By looking at the known facts about weight,
body composition, and their relationship to health risks, you
can develop achievable and healthy goals.
Be
sure of your reasons for making the change and get an objective
bodyfat analysis to be sure of your actual condition, since
many people have a distorted body image.
It's
also important to give yourself a reasonable time period to
expect changes. Many people get in trouble when they try to
lose weight very rapidly. The American Heart Association recommends
a maximum weight loss of two pounds per week. This may also
vary by the size of the dieter, and the amount of water weight
they are carrying.
A
common and dangerous practice often used by athletes is exercising
wearing multiple layers of clothes or rubber suits, especially
during hot or humid weather to "sweat" the weight off. People
have also abused laxatives and diuretics for the same purpose.
Excessive
loss of water (greater than two percent of body weight) causes
dehydration, decreased endurance, and can lead to loss of electrolytes,
heat stroke or heat exhaustion, brain damage, and death. Water
is also important for fat burning and muscle growth. Electrolytes
are minerals essential for proper nerve impulse conduction,
heart rhythm, and pH balance in the blood.
In
conclusion, there is no magic pill, powder or machine to lose
fat and get fit.
The
"no nonsense" guide to healthy living and to attain a healthly
permanent change in body composition and shape is to "eat healthy
and exercise" - eat a healthy, balanced diet that you will adhere
to over your lifetime, and exercise regularly by doing aerobic,
strength training, and stretching exercises.
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© 2000 PersonalMD.com. All rights reserved.
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