Archive for November, 2006
Wednesday, November 22nd, 2006
Quiting smoking results in weight gain that increases leptin and decreases ghrelin. Both of these changes reduce hunger, so the weight gain appears to be self limiting.
Apparently, elevated dopamine and norepinephrine are a major signaling mechanism for appetite while smoking. Quiting smoking returns the individual to the more normal appetite ...
Posted in Other | No Comments »
Tuesday, November 21st, 2006
A high fat meal reduces hunger while in the small intestine, not the stomach. This is induced via CCK (cholecystokinin), a gut hormone involved in appetite signaling.
Delaying the digestion of dietary fat elevates CCK further and results in higher CCK levels.
Abstract
Posted in Diet | No Comments »
Friday, November 17th, 2006
Intramuscular fat, stored in each muscle cell, is depleted with endurance exercise, just as glycogen is. This fat can only be replenished quickly if fat is consumed.
If intramuscular fat is not replenished, fat oxidation rates remain unchanged, but the fat is pulled out of the blood...which gets its fats from ...
Posted in Exercise | No Comments »
Thursday, November 16th, 2006
The claim that some obese individuals are ''carbohydrate sensitive'' seems to be related to insulin sensitivity and glucose tolerance. The quality of the carbohydrate in the diet is also critical.
In this study, the lean rats did much better on the high carbohydrate diet and the obese rats did better on ...
Posted in Diet | No Comments »
Wednesday, November 15th, 2006
Metabolic sensing neurons integrate a variety of signals and respond to glucose levels, fatty acids, insulin, leptin and other hormones and their metabolites. The brain uses this data to control appetite and food intake.
Some obese people experience a genetically reduced sensitivity of metabolic sensing neurons. This may be the target ...
Posted in Hormones | No Comments »
Tuesday, November 14th, 2006
Suppressing testosterone nullifies nearly all of the adaptations to strength training. The group whose testosterone was suppressed did not gain any strength, had only half of the lean mass gain and actually gained fat on the weight training regime.
Heavy weight training usually increases testosterone, but these subjects received medication to ...
Posted in Hormones | No Comments »
