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Original title: Study shows that fasting is more fat-burning
According to a timely new study on the interaction between mealtimes, metabolic health and physical activity, fasting can amplify the health benefits of exercise.
Researchers at the University of Bath and other institutions in the U.S. began to wonder whether mealtimes affect how much muscle fat people burn during exercise, which in turn affects the long-term metabolic effects of exercise, and in part explain why some people exercise better than others, the New York Times reported on November 27.
researchers recruited 30 overweight and sedentary men. They examined the men's health and insulin sensitivity and then divided them into three groups.
as the first group in the control group to continue the previous lifestyle. The other two groups began to do monitored morning exercises three times a week - wearing monitors and masks and riding dynamic bikes at medium speeds. These monitors and masks track their heart rate and the amount of fat and sugar they burn. The researchers also regularly asked how they felt about riding a bike.
exercise group drank a vanilla-flavored milkshake two hours before cycling, while the other drank a similar-flavored zero-calorie placebo drink. In other words, the placebo group went cycling on an empty stomach, but neither group knew.
exercise, the placebo group received a milkshake, while the milkshake group received a placebo.
this model lasted six weeks. The researchers then processed a large amount of data and found some significant differences between the three groups. Unsurprisingly, there was no change in the control group's health and insulin sensitivity, while the health of the two exercise groups improved, with a decrease in waist circumference, although there was little weight loss.
, however, the placebo group burned about twice as much fat per ride as the milkshake group. Everyone burned about the same number of calories while riding a bike, but the placebo group burned more calories from body fat.
at the end of the study, insulin sensitivity was also improved in both exercise groups because levels of certain proteins in their muscles increased, affecting the muscle cells' response to insulin and their use of blood sugar.
, a professor of physiology and nutrition at the University of Bath, said that overall, the findings suggest that "pre-breakfast exercise should allow you to improve your performance without increasing your intensity or time."
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