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A study published this week by the New England Journal of Medicine found that limiting time-limited diets at 8 am and 4 pm still had risk factors for weight, body fat, and metabolism compared to daily calorie restriction. It did not decrease significantly.
Researchers at Southern Medical University in Guangzhou, China, randomly assigned 139 obese patients to two groups. For participants who only engaged in daily calorie restriction without a time-limited regimen.
Male participants were instructed to limit their daily calorie intake to 1500-1800 calories, while females followed a daily calorie restriction of 1200-1500 calories.
The main result of the study was the difference in body weight between the two groups from baseline, and the secondary result was changes in waist circumference, obesity index, body fat mass, and metabolic risk factor measurements. bottom.
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Participants are encouraged to weigh foods to accurately report calories, need to keep a food diary, take pictures of the foods they ate during the first 6 months of the study, food pictures And recorded meals three times a week. Last 6 months.
Of the 139 participants, 118 completed the study, and the researchers said that “the change in body weight was not significantly different between the two groups at the 12-month assessment.”
“In addition, time-limited diets and daily calorie restriction had similar effects on lowering body fat, visceral fat, blood pressure, blood sugar, and lipid levels over a 12-month intervention period,” the researchers say. Says.
Although the authors explain most of the beneficial effects associated with time-limited diets with calorie restriction, their findings show that time-restricted diets are for weight management. Suggested that it could be an alternative to calorie restriction.
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“We speculate that these data support the importance of limiting calorie intake in adhering to a time-limited dietary regimen,” the study said.
The authors warned that the study could not be generalized for different periods of diabetics, heart disease, and time-limited diets, because physical activity was not controlled because total energy expenditure was not measured. I also noted that the study was limited.
Dr. Christopher Gardner, Head of Nutrition Research at Stanford University Center for Preventive Research, said:
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“But the takeaways supported by this new study helped more than simply reducing daily caloric intake due to weight loss and health factors when subjected to well-designed and conducted research (scientific research). It means that there is no such thing. ”