| GLYCEMIC
INDEX
What is the Glycemic Index (GI)?
They glycemic index ranks foods on how they
affect our blood sugar levels. This index measures how much your
blood sugar increases in the two or three hours after eating.
The glycemic index is about foods high in
carbohydrates. Foods high in fat or protein don't cause your blood
sugar level to rise much.
Your body (pancreas) secretes a hormone called
insulin to counteract the sugar. The insulin acts like a transport
mechanism for the distribution of different molecules (glycogen
(energy), amino acids (building blocks), fats (stored energy) etc.)
to certain cells.
By ingesting foods (carbohydrates) with a
high GI, your stimulating your body to secrete high levels of insulin.
If your body has not just completed some activity like resistance
training, the insulin has no need to transport the carbohydrate
(which stimulated the insulin) anywhere for use, therefore it transports
it to be stored (in fat cells) for later use. Stored carbohydrates
are the number 1 component to adding body fat. Therefore, perhaps
the most important factor in controlling body fat is consuming foods
with a low GI.
When you make use of glycemic index to prepare healthy meals, it
helps to keep your blood sugar levels under control. This is especially
important for people with diabetes, although athletes and people
who are overweight also stand to benefit from knowing about this
relatively new concept in good nutrition.
Scientists have so far measured the glycemic
indexes of about 300 high-carbohydrate foods. The key is to eat
little of those foods with a high glycemic index and more of those
foods with a low index.
What about Portion Size? And how is GI Determined?
The glycemic index is about the quality of
the carbohydrates, not the quantity. Obviously, quantity matters
too, but the measurement of the glycemic index of a food is not
related to portion size. It remains the same whether you eat 10
grams of it or 1000 grams. That's because to make a fair comparison
tests of the glycemic indexes of food usually use 50 grams of available
carbohydrate in each food. For example, you can eat twice as many
carbohydrates in a food that has a glycemic index of 50 than one
that has a glycemic index of 100 and have the same blood glucose
response.
METABOLISM
Definition: The continuous process
in living organisms and cells, comprising those by which food is
broken down into simpler substances or waste matter and used to
maintain vital function.
Before we can understand how exercise and
proper nutrition affect our bodies, we must first understand our
metabolism. Your metabolism is like the activity level of your body.
The greater the need for energy in your body, the faster your metabolism
will be. Likewise, the less energy your body needs the slower your
metabolism will be.
Your metabolism is regulated by one thing,
which is the amount of lean body mass you have. Therefore, it's
not only important to reduce your body fat to increase your metabolism.
It is equally important to increase your muscle mass or density.
This doesn't necessarily mean increasing the size of your muscle
tissues. More often, it means increasing the density of your muscles.
This simply means increasing the tonicity of the muscles (making
them firmer). The greater your muscle mass or density is, the harder
your body has to work to maintain that state.
HOW TO REGULATE YOUR METABOLISM THROUGH
YOUR DIET
Since your metabolism is the amount of energy
your body expends in order to maintain itself, anything that helps
you expend energy, helps to raise your metabolism. For example,
exercise expends a great deal of energy; therefore, it is an important
factor in increasing your metabolism. The digestive process expends
more energy than almost anything you do, therefore, putting your
body through the digestive process actually enhances your metabolism.
For that reason it is important to eat many small meals through
the day, to stimulate your metabolism. For example, a normal person
may eat three (3) meals per day, with each meal consisting of 700
calories, totaling 2,100 calories for the day. If every time he
ate he burned 500 calories through the digestion process, he will
have consumed 2,100 calories and burned 1,500 calories (through
digestion) therefore leaving 600 calories for normal daily activity.
However, if that same person ate the same amount of food except
did so in five portions as opposed to 3 they will now have burned
2,500 calories (through digestion) and still having only consumed
2,100 calories, leaving a deficit of 400 calories. In order to maintain
itself the body would have to give up 400 calories (from stored
body fat) just to complete digestion. Therefore, a great way to
increase your metabolism through your diet is to consume many small
meals throughout the day as opposed to less larger meals. |