Skipping
breakfast and overeating in the evening have been shown to play a significant
role in weight gain and obesity. A study in the journal Obesity found that
consuming the heaviest meal of the day at breakfast and the lightest at dinner
can lead to significant weight loss.
From June
to October 2012, researchers at Tel Aviv University in Israel recruited 93
overweight and obese women to participate in a three-month, 1,400-calorie-a-day
diet, an amount recommended in some weight-loss diets. The women were in their
mid-40s and had metabolic syndrome, the term for a cluster of health conditions
associated with Type 2 diabetes. Half the women were assigned to a breakfast
group (BF) that consumed 50% of the allotted daily calories at breakfast, 36%
at lunch and 14% at dinner. A dinner group (D) did the opposite, eating 14% of
calories at breakfast, 36% at midday and 50% at dinner. Participants were
measured for various body and metabolic markers every two weeks.
The BF
subjects lost an average 19.1 pounds over 12 weeks, while the D group shed 7.9
pounds. BF subjects trimmed 3.3 inches from their waistlines compared with 1.5
inches in D group; body-mass index dropped 10% and 5% in the BF and D groups,
respectively.
Average
triglyceride levels, an indicator of cardiovascular health, decreased by 34% in
BF subjects but increased by 15% in D subjects. Total cholesterol slightly
decreased in both groups but HDL levels, the so-called good cholesterol,
increased significantly only in the BF group.
Levels of
glucose, insulin and ghrelin, an appetite hormone, decreased significantly in
both groups but to a greater extent in BF subjects. The BF group also had
significantly lower glucose and insulin responses in post-lunch blood tests,
suggesting that eating a relatively high-calorie breakfast helped to maintain
stable insulin levels after the second meal of the day, researchers said.
Caveat: The study was too short to determine the long-term health benefits of high-energy intake at breakfast, they said.
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