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As a person sheds weight, their body’s metabolism typically slows down. That may a contributing factor into the startling revelation that only one in six overweight adults who lose at least 10 percent of their weight remain at the same weight a year later.
Obesity and Nutrition researcher at Boston Children’s Hospital Cara Ebbeling decided to put some metabolic questions to the test. She had 21 overweight people go on a calorie-restrictive diet until they lost at least 10 percent of their weight. Once they had, she had them follow three different dieting regimens, which all had the same amount of calories, for four weeks each.
The first was a low-fat diet fashionable years ago, the second was a low-glycemic-index diet, focusing on foods that are digested slower, such as legumes, fruits and veggies, and the third was a low-carb diet.
Participants on the low-carb diet were able to burn almost 300 extra calories each day, or the equivalent of a moderate-intensity hour long workout session. The diet wasn’t without it’s drawback thought; the test saw participants gain increased stress hormones, a risk factor in both diabetes and heart disease.
Ebbeling has plans to follow up the study, and see if any of the effects, good or bad, were able to stick around long term.