[ad_1]
The idea of losing weight is very appealing: Limit your eating to six to eight hours each day, during which you can eat whatever you want.
Studies in mice seemed to support the so-called time-restricted eating, a form of the popular intermittent fasting diet. Small studies on people with obesity have suggested that it may aid weight loss.
But now, a tough year to work where people follow a low-calorie diet between 8 a.m. and 4 p.m. or consume the same number of calories at any time during the day found no effect.
As a result, diet researcher at the University of California, San Francisco, Dr. Ethan Weiss said: “There is no use in eating in a narrow window.”
The study, published Wednesday in the New England Journal of Medicine, was led by researchers at Southern Medical University in Guangzhou, China, and involved 139 people with obesity. Women ate 1,200 to 1,500 calories per day and men consumed 1,500 to 1,800 calories per day. To ensure compliance, participants were asked to take pictures of each item they ate and keep a food diary.
Both groups lost weight—an average of 14 to 18 pounds—but there was no significant difference in the amount of weight lost with either diet strategy. There was no significant difference between the groups in waist circumference, body fat and lean body mass measurements.
The scientists also found no differences in risk factors such as blood sugar levels, sensitivity to insulin, blood lipids or blood pressure.
Dr. “These results suggest that calorie restriction explains many of the beneficial effects seen in a time-restricted diet,” Weiss and colleagues said.
The new study isn’t the first to test time-restricted eating, but previous studies were generally smaller, shorter in duration, and lacked control groups. This research tended to conclude that people lose weight by eating only for a limited amount of time during the day.
Dr. Weiss himself was a true believer in time-restricted eating, and said he ate only between noon and 8 p.m. for seven years.
In previous searchhe and colleagues asked some of the 116 adult participants to eat three meals a day, with snacks if they were hungry, and others were instructed to eat whatever they wanted between noon and 8 p.m. Participants lost a small amount of weight—a difference of an average of two pounds in the time-restricted eating group and 1.5 pounds in the control group was not statistically significant.
In an interview, Dr. Weiss recalled having trouble believing the results. He asked statisticians to analyze the data four times before he said more studies would not change the results.
“I was a devotee,” he said. “That was a hard thing to accept.”
This experiment only lasted 12 weeks. Now, even a one-year study seems to have found no benefit in time-restricted eating.
D., director of nutritional research at the Stanford Prevention Research Center. Christopher Gardner said he wouldn’t be surprised if time-restricted eating sometimes works.
“Almost every type of diet works for some people,” she said. “But the conclusion supported by this new research is that when subjected to a properly designed and conducted study – scientific research – it is no more beneficial for weight loss and health factors than reducing daily calorie intake.”
Weight loss experts said time-restricted diets are unlikely to go away. “We don’t have a clear answer yet” on whether the strategy helps people lose weight, said researcher Courtney Peterson, who studies time-restricted eating at the University of Alabama at Birmingham.
He suspects the diet will benefit people by limiting the number of calories they can consume each day. Dr. “We just need to do larger studies,” Peterson said.
D., director of the Comprehensive Weight Control Center at Weill Cornell Medicine in New York City. Louis J. Aronne said in her own experience that some people who have trouble with calorie-counting diets do better when they’re told to just eat. a limited time each day.
“While this approach hasn’t been shown to be better, it doesn’t look any worse than calorie counting,” he said. “It gives patients more options for success.”
Co-director of the Center for Weight Management and Wellness at Brigham and Women’s Hospital in Boston. Caroline Apovian said the hypothesis behind time-restricted eating is that circadian genes thought to increase metabolism are turned on during daylight hours.
He added to the question for the researchers: “If you eat a little too much during the daytime, can you burn those calories instead of storing them?” Dr. Apovian said he’d like to see a study comparing time-restricted eating to a group of subjects who binge eat all day with a group who also binge eat.
He said that despite our lack of evidence, he would still recommend time-restricted meals to patients.
Dr. For Weiss, he said his own research convinced him and the new data strengthened his belief that time-restricted eating offers no benefit.
“I started breakfast,” he said. “My parents say I’m much better.”
[ad_2]
Source link