Colesterol "ruim" Não É Tão Mal E Ajuda Na Sacopenia

[quenca333]

edit: saRcopenia, desculpe pelo erro

não vou traduzir, mas quem quiser sinta-se a vontade.

'Bad' Cholesterol Not as Bad as People Think, Study Shows

ScienceDaily (May 5, 2011) — The so-called "bad cholesterol" -- low-density lipoprotein commonly called LDL -- may not be so bad after all, shows a Texas A&M University study that casts new light on the cholesterol debate, particularly among adults who exercise.

Steve Riechman, a researcher in the Department of Health and Kinesiology, says the study reveals that LDL is not the evil Darth Vader of health it has been made out to be in recent years and that new attitudes need to be adopted in regards to the substance. His work, with help from colleagues from the University of Pittsburgh, Kent State University, the Johns Hopkins Weight Management Center and the Northern Ontario School of Medicine, is published in the Journal of Gerontology.

Riechman and colleagues examined 52 adults from ages to 60 to 69 who were in generally good health but not physically active, and none of them were participating in a training program. The study showed that after fairly vigorous workouts, participants who had gained the most muscle mass also had the highest levels of LDL (bad) cholesterol, "a very unexpected result and one that surprised us.

"It shows that you do need a certain amount of LDL to gain more muscle mass. There's no doubt you need both -- the LDL and the HDL -- and the truth is, it (cholesterol) is all good. You simply can't remove all the 'bad' cholesterol from your body without serious problems occurring.

Cholesterol is found in all humans and is a type of fat around the body. A person's total cholesterol level comprises LDL (low-density lipoprotein) and HDL (high-density lipoprotein) cholesterol.

LDL is almost always referred to as the "bad" cholesterol because it tends to build up in the walls of arteries, causing a slowing of the blood flow which often leads to heart disease and heart attacks.

HDL, usually called the "good cholesterol," often helps remove cholesterol from arteries.

"But here is where people tend to get things wrong," Riechman says.

"LDL serves a very useful purpose. It acts as a warning sign that something is wrong and it signals the body to these warning signs. It does its job the way it is supposed to.

"People often say, 'I want to get rid of all my bad (LDL) cholesterol,' but the fact is, if you did so, you would die," the Texas A&M professor adds. "Everyone needs a certain amount of both LDL and HDL in their bodies. We need to change this idea of LDL always being the evil thing -- we all need it, and we need it to do its job."

According to the American Heart Association, about 36 million American adults have high cholesterol levels.

"Our tissues need cholesterol, and LDL delivers it," he notes. "HDL, the good cholesterol, cleans up after the repair is done. And the more LDL you have in your blood, the better you are able to build muscle during resistance training."

Riechman says the study could be helpful in looking at a condition called sarcopenia, which is muscle loss due to aging. Previous studies show muscle is usually lost at a rate of 5 percent per decade after the age of 40, a huge concern since muscle mass is the major determinant of physical strength. After the age of 60, the prevalence of moderate to severe sarcopenia is found in about 65 percent of all men and about 30 percent of all women, and it accounts for more than $18 billion of health care costs in the United States.

"The bottom line is that LDL -- the bad cholesterol -- serves as a reminder that something is wrong and we need to find out what it is," Riechman says.

"It gives us warning signs. Is smoking the problem, is it diet, is it lack of exercise that a person's cholesterol is too high? It plays a very useful role, does the job it was intended to do, and we need to back off by always calling it 'bad' cholesterol because it is not totally bad."

fonte:

http://www.sciencedaily.com/releases/2011/05/110505142730.htm

Editado Maio 6, 2011 às 14:45 por quenca333

[LeandroTwin]

Muito bom, tinha um tópico falando sobre o consumo obrigatório de gorduras saturadas. Concordo totalmente.

Eu mesmo não troco meu iogurte integral por desnatado hehe.

Valeu Quenca, vou mover para artigos.

Abraço

[Matheus A.]

muito bom quenca! +1

[perninhafw]

sensacional...quebrando paradigmas...experimente conversar com profissionais da área médica ou dos esportes, ninguém vai acreditar nisso...também é verdade q poucos se atualizam...

"Our tissues need cholesterol, and LDL delivers it," he notes. "HDL, the good cholesterol, cleans up after the repair is done. And the more LDL you have in your blood, the better you are able to build muscle during resistance training."

achei essa a parte mais importante do texto => "...quanto mais você tem LDL no sangue, melhor você será capaz de construir o músculo durante o treinamento de resistência."

então quenca, me corrija se estiver errado, se o LDL estiver alto, não significa q vc terá problemas cardíacos, falando especificamente de quem treina com pesos em nível moderado a avançado. meu caso por exemplo, nesta terça peguei meus exames de sangue, apresentando os seguintes resultados:

Total = 228 mg/dL (valores de referência: Desejável = inferior a 200 mg/dL / Elevado = superior a 240 mg/dL)

HDL = 49 mg/dL (valores de referência: Desejável = superior a 40 mg/dL)

Relação Total/HDL = 4,65 (valores de referência: até 5,0)

ou seja, devo me preocupar com aquele valor acima do desejável do colesterol total?

http://www.sciencedaily.com/releases/2008/12/081201081713.htm

acima o link de outro artigo muito interessante sobre o mesmo tema, é de dezembro de 2008, abaixo tirei a parte mais interessante:

The researchers came to this conclusion after reviewing published research on this subject. In their review, they found that the HDL from people with chronic diseases such as rheumatoid arthritis, kidney disease, and diabetes is different from the HDL in healthy individuals, even when blood levels of HDL are comparable. They observed that normal, "good," HDL reduces inflammation, while the dysfunctional, "bad," HDL does not.

"This is yet one more line of research that explains why some people can have perfect cholesterol levels, but still develop cardiovascular disease," said Gerald Weissmann, M.D., Editor-in-Chief of The FASEB Journal. "Just as the discovery of good and bad cholesterol rewrote the book on cholesterol management, the realization that some of the 'good cholesterol'

abç!

Editado Maio 18, 2011 às 03:55 por perninhafw

[quenca333]

Não significa q vc terá problemas cardíacos, necessariamente, ainda mais nessa idade. Tem muitos fatores de risco que contribuem para isso também. Mais importante que o colesterol total é o LDL, que apesar de essencial como foi provado em excesso pode causar problemas. O total não dá para falar muito, mas ter colesterol LDL alto não é um bom sinal.

O que eu venho sempre dizendo aqui é que o fator stress, genética, (esteroides), sedentarismo e obesidade contam muito mais para elevar o colesterol do que a alimentação e isso pode ser observado com a maioria das pessoas que consomem vários ovos por dia e ainda tem ele baixo. Mas em casos que ele ultrapassa os limites clínicos é interessante fazer um controle na alimentação sim.