World of big muscles

1/20/2011

The fight against obesity. Science News

Muscle reliefDietary fats are not denied any influence on weight gain.

Fat is a "dietary renegade" from the 1970's. Many organizations that supervise health, recommended reducing consumption of dietary fat - mostly saturated fats, which are found in animal products.


Dr. Nita Forouhi with colleagues from the Institute of Metabolic Science in Cambridge, Great Britain, found that fat consumption - including the ratio of saturated and unsaturated fats - has no effect on weight gain. The study tested the link between fat intake and weight changes of about 90 000 people for 10 years. People recruited about 100 grams per year.

Do not focus on one factor, some sort of fat. In contrast, weight management depends primarily on the level of physical activity and well-balanced diet. Avoid excessive consumption of sugar, fat and alcohol, as they all contain lots of calories but poor in useful substances.

American Journal of Clinical Nutrition, 90: 1632-1641, 2009

Green tea extract has no positive effect on fat loss or endurance

Green tea contains powerful antioxidants called polyphenols (epigallocatechin Galat, or EGCG), which increase the endurance of mice and promote fat loss in humans.

A study in the Waikato Institute of Technology in Hamilton, New Zealand, found that green tea extract had no effect on the oxidation of fats or competing in endurance cyclists. Athletes received supplements with green tea extract, caffeine or placebo before the arrival met for 60 minutes and the subsequent 40-kilometer race at a time. After which the results of the three groups were compared.

Green tea extract contains high levels of EGCG, had no effect on cycling performance of arrival or on burning fat during exercise.

International Journal of Sport Nutrition and Exercise Metabolism, 20: 624-644, 2009

Fat men die earlier

Men with excess weight die younger lean, even if they do not have major risk factors for heart disease such as high cholesterol, high blood pressure or diabetes.

Swedish scientists have seen 30 years for 2000 men. Full or obese men die earlier and have more often been diagnosed with a heart attack or stroke than in lean men, even in the absence of risk of heart disease. Obese men with metabolic syndrome (a complex of symptoms that includes high cholesterol, high blood pressure and a large amount of fat in the abdomen) showed an increased risk of heart attack or stroke by 250%.

The study did not assess the impact of physical activity. Several previous studies have shown that physical activity - it's good protection from heart disease and risk of premature death, even in the presence of completeness.

Circulation, in press; published online December 28, 2009

Weight Training supports a healthy metabolism (metabolism) after re-gaining weight

Ninety percent of people who have reduced the weight gain it back within 12 months. Many people lose all the benefits of weight loss because again a lot of eating and little exercise.

Study University of Missouri, led by Tom Thomas, showed that strength training at the stage of the return of the weight supported by the results achieved to maintain a healthy metabolism and increased muscle mass and endurance. People have lost 4-6% weight by restricting caloric intake and doing aerobics.

After a period of weight loss, the volunteers participated in a controlled return of the weight, during which they trained with weights. In the process of weight gain, no change in the percentage of body fat have been identified, as well as a change in the waist, the blood sugar level or aerobic endurance.

Strength training is an effective means to maintain the positive results of weight loss.

Journal Clinical Hypertension (Greenwich), 12: 64-72, 2010

Increasing the number of meals does not cause weight loss

The myth about weight loss said that food in small portions throughout the day, as opposed to eating several times a day in large chunks, promotes weight loss. It was logical to assume that frequent meals in small amounts improves the absorption of calories from food, suppresses appetite and increases the levels of chemicals that prevent hunger.

A study in the University of Ottawa Eric Dowsett found that small portions of food do not lead to weight loss. People who participated in the study received low-calorie diet, divided into three or six meals a day for eight weeks (the number of calories in both groups were similar). Both groups lost about 5% of weight, but the frequency of feeding had no effect on this result.

Feeding small meals throughout the day has no effect on weight loss.

British Journal Nutrition, press; published online November 30, 2009

The fight against obesity. Science News.


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