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  A New Way to Look at Carbohydrates Post #3 (permalink)  
Old Jan. 01/09, 04:51 AM
Cookn
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Join Date: Dec 2008
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While I don't disagree with the article, I do have issues with a couple of things. First of all, where did the article originate, what is the science behind the conclusions, is it some ones research project or are they basing their assumptions facts that can't be proved.

First assumption that I have questions about, is stating that 40 to 45 percent of the bodily energy comes from carbs. This is based on the assumption of an average "Western" diet and what it contains. A truly balanced diet would and should contain a higher percentage of carbs. If you look at the history of diet composition over the last century, in the early 1900's a higher percentage of the average diet was complex carbs. Mount Sinai School of Medicine research suggests that the average diet in the early 1900's was composed of 55 to 60 percent carbs, most of which were complex and starchy. Processed food wasn't available at the time, most food was home grown or raised and diets were much more balanced as far as caloric intake concerned. While I don't disagree, I'd like to see facts rather than assumption.

Again the assumption on blood sugar spikes is correct to a point, but fails to also note that some complex carbs, like rice with a high glycemic index, can also cause rapid blood glucose spikes. There is much more research to be done in this area and to blame blood glucose spikes entirely on monosaccharides is not being fully responsible or accurate. Glycemic Index research is still on going at this time and it should open many doors of knowledge into diabetes and the way foods react within our bodies.

"It takes a little longer for the digestive system to break down the chemical bonds in a complex carbohydrate than a simple one. This is partly why a sugary snack provides a quick lift in energy, and a bowl of whole grain cereal or a slice of whole grain bread gives a slower and more sustained one. This breakdown starts in the mouth with chewing and culminates in the small intestine. Various digestive enzymes split the molecular bonds in sugars and starches until only monosaccharides remain. Eventually, these sugar compounds are absorbed through the wall of the small intestine and then circulated into the bloodstream through the liver as blood glucose.

The body can put glucose to work in three ways:

1. It can burn the glucose immediately, splitting it into smaller fragments within individual cells and releasing carbon dioxide, water and energy.

2. If the glucose isn't needed for energy right away, it's converted by the liver or the muscles into glycogen, which can be converted back into glucose later. Glycogen stored in muscles provides energy only to the muscles; glycogen supplies from the liver can supply any part of the body. A burst of blood glucose is a part of our natural defense mechanism: when the hormone epinephrine or adrenaline, is released as part of the bodies "fight or flight" reaction, it triggers a burst of glucose from the liver as an emergency boost of energy.
The bloodstream holds only about an hour's worth of glucose, and the body can store only enough glycogen for half a days needs. Thus, bodily carbohydrate reserves can be depleted in less than 24 hours without food. After all glycogen stores have been used, fat deposits are converted to fuel as an alternate energy source.

3. If the body has an excess of glucose, and all glycogen storage sites are full, the surplus glucose is converted to fat by the liver and stored in adipose-tissue deposits around the body. If needed these fatty acids can be burned for fuel ( although the fat cannot be converted back to glucose).
The body has a nearly unlimited ability to store excess calories from any food group as fatty tissue. The degree and pattern of fat buildup depends on a wide array of factors, including genetics and lifestyle, but are primarily related to whether a person consistently consumes more than are burned through activity" Victor Herbert, M.D. from the article "Carbohydrates" in Total Nutrition from The Mount Sinai School of Medicine

This excerpt adds important knowledge to the information posted. It increases the understanding of how carbs react in your body. Because of the limited storage capability of ready to use energy in the body, it helps you realize that a balanced diet with a caloric deficit is paramount to weight loss. Like I said I don't disagree with the article, I feel like it left very important information out and it's a very limited point of view.
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