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According to a new study orchestrated by Boston Children & # 39; s Hospital, in partnership with Framingham State University, eating less carbohydrates actually increases the number of calories burned.
Over a 20-week period, scientists provided 234 overweight participants (body mbad index of 25 or older) aged 18 to 65 with meals.
The weight was carefully monitored while the secretion of insulin, metabolic hormones and the amount of calories burned were all measured.
Initially, the program lasted 10 weeks. After reaching this level, 164 volunteers reach their goal of losing 10 to 14% of their weight. They continued the maintenance phase of the study.
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"It's the longest and longest eating study to test the" Carbohydrate-Insulin Model ", which provides a new way of thinking and treating obesity "says Dr. David Ludwig, co-investigator of the study.
"According to this model, the processed carbohydrates that flooded our diet during the low-fat period increased insulin levels, causing fat cells to store excessive calories.With fewer calories available for the rest of the body , hunger increases and metabolism slows down – a recipe for weight gain. "
In the second part of the experiment, participants followed a randomized high, medium or low carbohydrate diet for another 20 weeks. The carbohydrate intake accounted for 60.40 and 20% of total calories respectively.
The researchers ensured that the carbohydrates provided were of high quality. Total caloric intake has been modified to maintain weight loss.
The purpose of the survey was to determine the extent to which groups consuming different amounts of carbohydrate affect energy expenditure. Interestingly, participants in low carb diets burned more calories than their carbohydrate counterparts.
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"If this difference persists – and we do not see any decrease over the 20 weeks of our study – this effect would result in a weight loss of about 20 pounds after three years, with no change in caloric intake. ", adds Dr. Cara Ebbeling.
Other health factors affect the outcome: in individuals with the highest insulin secretion, caloric expenditure was greater between low carb diets and high carbohydrate diets.
"Our observations challenge the belief that all calories are the same for the body," says Ebbeling.
"Our study did not measure hunger and satiety, but other studies suggest that low carb diets also decrease hunger, which could help lose weight in the long run."
As with all things, if you have health problems, it is always important to consult your doctor before starting a new program.
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