How to Lose Weight: Food for Thought

When it comes to weight loss, most of us would like to engage in what psychologists call "magical
thinking." We'd like to believe that some easy trick or ritual would allow us to shed pounds while eating
anything we liked. Wouldn't it be nice if consuming all our food before 6 p.m., doing yoga, or hopping on
one foot for five minutes would allow us to chow down with all our favorite goodies and still lose weight?

Unfortunately, despite what legions of people with a book or a product to sell might claim, it's just not so.
Yet it really is possible to come up with a system for losing weight. The real secret is this:It's all about
the calories.

Most of us have heard that sensible weight loss involves some combination of diet and exercise. As a
physician, I'm surely not going to tell people to avoid exercise. For most people, exercise is a very
healthy thing to do. But when it comes to losing weight, unless we're training for the Olympics, the effect
of exercise is minor. What matters most is how many calories go down the hatch.

This bears explaining. Our bodies use the calories we consume to fuel our basic life-processes. The
heart needs lots of fuel (calories) to beat its typical 100,000 times in 24 hours. The brain, liver and
kidneys also require lots of fuel to perform their many chemical reactions and metabolic tasks. Most of
the calories we burn in 24 hours (about 1500 for women and 1800 for men) we would still burn even if
we were in a coma.

It's true that working the muscles in our arms, legs and trunk requires fuel (calories) as well, but you'd
be amazed how long you would have to row, jog, swim or walk to burn off the calories in one slice of
cherry pie. (Answer: In order to burn the 486 calories in a slice of cherry pie a 175-pound person would
need to row for 35 minutes, jog for 37 minutes, swim for 41 minutes or walk briskly for 63 minutes.) For
most of us it would be more practical to just not eat the pie.

Each of us has a calories-per-day figure for maintaining body weight. If, on the average, we eat that
many calories, then we will maintain body weight, neither gaining nor losing. If we consistently eat more
calories than our break-even number, then we will gain weight. The unused calories have to be stored
somewhere, and will probably go into our body's fat cells. If we consistently eat fewer than our break-
even number of calories, then we will lose weight. The body will get its fuel somewhere, and will burn off
calories that have been put into storage in fat cells.

This is how it is. We just can't get around the basic biology and physics.

So, if we're trying to lose weight, how do we choose what we do or don't eat? Well, sometimes, our
choices are haphazard. A useful analogy concerns shopping. How in the world could we do a good job
of shopping without knowing the prices of the items we're putting in our shopping carts? Without
knowledge of the prices our choices in merchandise could easily exceed our budget.

The same holds true when it comes to eating. If we wanted to budget our calories, how in the world
could we make good choices if we didn't know the calorie count of the foods we eat? We just couldn't do
a good job. Our calorie intake per day would probably exceed our break-even point for maintaining
body weight, and we would gain.

So, in order to make sensible choices, it's crucial to know the approximate number of calories in the
foods we eat. An easy way to do that is to buy a paperback book in the check-out line of your grocery
store that lists the calorie content of usual portions of commonly consumed food and beverages. (Or
look them up online.) We don't necessarily need to check the list each time we sit down to eat, but
knowing typical figures for our favorite foods will enable us to know if we're keeping or exceeding our
daily calorie budget.

This is not as awful as it sounds. In fact, there can be pleasant surprises. Suppose I typically get the
munchies in the evening, and I roam the house in search of goodies to snack upon. Here is where
knowledge of calorie contents can pay off. If I satisfy my munchies by eating cookies, French fries,
potato chips or candies, then I'll blow my daily food-budget in just one sitting. But what if I substitute
pretzels or unbuttered popcorn? They might be just as satisfying, yet contain fewer calories. So these
alternative choices might spare my daily calorie budget at no loss of satisfaction.

As a physician I often encourage my patients to lose weight. Being overweight can increase blood
pressure and cholesterol which, in turn, increase the likelihoods of heart attacks and strokes. Heart
attacks and strokes are the number one and number three causes of death in the U.S., respectively,
and strokes are the number one cause of disability. So we're talking about real conditions that afflict
real people. Moreover, our overweight bodies put more stress and strain on our spines and our knees,
making them wear out earlier, hurt more, and interfere with quality of life.

Some patients with whom I have this conversation look at me like I'm crazy. They say they're eating
barely enough food to keep a small bird warm. The problem—or the solution—couldn't possibly lie with
the food they eat.

The incentives are clear. The choices are ours to make. We shouldn't blame our metabolism. And we
shouldn't delude ourselves that we consume barely enough to keep ourselves alive, and yet still,
unaccountably, gain weight. We need to take our health into our own hands and start making choices
that increase the quality and quantity of our remaining years.

(C) 2005 by Gary Cordingley