It is known that short-term sleep deprivation increases plasma concentrations of ghrelin (a hormone related to increased appetite) and decreases those of leptin (a hormone related to satiety.)
In a randomized crossover study, researchers studied twelve normally healthy non-obese men to observe the effect of sleep deprivation on energy intake and physical activity. During the first night of each 48-hour session, subjects had either 8 hours (from midnight to 8:00 a.m.) or 4 hours (from 2:00 a.m. to 6:00 am. of sleep. All foods consumed thereafter (jam on buttered toast for breakfast, buffet for lunch, and a free menu for dinner) were eaten with no restrictions. Physical activity was also recorded. Sensations of hunger, perceived pleasantness of the foods, desire to eat some foods, and sleepiness were also evaluated.
In comparison with the 8-hour sleep session, subjects consumed 559 (22%) more calories on the day after sleep restriction, and hunger was higher before breakfast and dinner. Researchers observed no change in the perceived pleasantness of the foods or in the desire to eat the foods. Physical activity was slightly higher after sleep restriction than after 8 hours of sleep, even though the sensation of sleepiness was more apparent.
In this group of healthy men, one night of reduced sleep led to an increase in food intake and, to a lesser extent, physical activity-related energy expenditure. Although further research is needed to confirm the results of this small study, these results suggest that sleep restriction could be a factor that promotes obesity. B. Romer MA .
Go get some zzzzz's! :)
Showing posts with label obesity. Show all posts
Showing posts with label obesity. Show all posts
11.05.2009
Fat Hormone # 3 Ghrelin
Ghrelin is a hormone secreted by the stomach, and like leptin, it acts on the hypothalamus, but ghrelin increases appetite rather than decreases like leptin
The levels of grehlin are regulated through the day and are closely correlated with meal time. Levels of ghrelin are highest just before a meal.
Sudies have shopwn that one of the main reasons people tend to put lost weight back on after a diet is that ghrelin levels increase dramatically after dieting. This causes uncontrollable humger and eventual over-eating.
A hormone called, Peptide YYS-36 is produced by the stomach cells and has the effect of reducing ghrelin secretion.
Lean people tend to produce more of this hormone than obese people. This adds credence to the fact that obesity is more of a metabolic disorder than was first thought.
It may be possible to increase the body's production of Peptide YY3-36 by eating more frequent small meals.
This enables the stomach to have small amounts of food in it through the day which stimulates secretion of Peptide YY3-36 and reduces ghrelin secretion to reduce humger.
In Summary:
Eat small planned meals throught the day, 5 is a good number. Eat in moderation. Use a small bowl or plate, quit with one serving. Choose healthier food in its natural state; not processed with all the enzymes killed. Meta 21 can help you in your weight loss journey by introducing the important enzymes back into your body helping to break down the food and helping you assimilate what you need and getting rid of what you do not need.
The levels of grehlin are regulated through the day and are closely correlated with meal time. Levels of ghrelin are highest just before a meal.
Sudies have shopwn that one of the main reasons people tend to put lost weight back on after a diet is that ghrelin levels increase dramatically after dieting. This causes uncontrollable humger and eventual over-eating.
A hormone called, Peptide YYS-36 is produced by the stomach cells and has the effect of reducing ghrelin secretion.
Lean people tend to produce more of this hormone than obese people. This adds credence to the fact that obesity is more of a metabolic disorder than was first thought.
It may be possible to increase the body's production of Peptide YY3-36 by eating more frequent small meals.
This enables the stomach to have small amounts of food in it through the day which stimulates secretion of Peptide YY3-36 and reduces ghrelin secretion to reduce humger.
In Summary:
Eat small planned meals throught the day, 5 is a good number. Eat in moderation. Use a small bowl or plate, quit with one serving. Choose healthier food in its natural state; not processed with all the enzymes killed. Meta 21 can help you in your weight loss journey by introducing the important enzymes back into your body helping to break down the food and helping you assimilate what you need and getting rid of what you do not need.
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