Bodyweight Regulation: Leptin Part 5
Leptin and insulin also both change with changing food intake; leptin levels can drop significantly within a few days of dieting even with no change in body fat levels. Insulin changes meal to meal.
Bodyweight Regulation: Leptin Part 4
Basically, the body appears to be sensing ‘energy availability’ (defined as energy intake minus expenditure) and adjusting things based on that. I’d, of course, note that exercise still plays plenty of other crucial roles (including psychological, which I am getting back to slowly but surely) in terms of dieting and fat loss.
Bodyweight Regulation: Leptin Part 3
When it was originally discovered, leptin was originally conceived as an ‘anti-obesity’ hormone, it was thought that leptin should act to prevent weight gain. This led one researcher to quip (and I’m paraphrasing here) that “If leptin is meant to act as an anti-obesity hormone, it has to go down in history as the most ineffective hormone in the human body” or something roughly to that effect.
Part 5 of my interview for Body Improvements
The fifth and final part of my interview with Steve Troutman is now up at Body Improvements. Lyle Bodyrecomposition
Bodyweight Regulation: Leptin Part 2
In the last post, I talked primarily about leptin (and a bit about insulin,and a very little bit about the other hormones) and its discovery and how it may be the (or at least one of the) long-sought after hormones involved in regulating bodyweight.
Bodyweight Regulation: Leptin Part 1
With early research (I’m talking the 1950’s) having established the existence of some type of setpoint (again, primarily in animal models), early researchers had to sort of guess what might be going on in terms of regulating body fat levels.
Set Points Settling Points and Bodyweight Regulation Part 2
Recall from Part 1 that the set point idea basically says that the body will attempt to defend some body weight (or body fat) level (or perhaps range) by adjusting things such as metabolic rate, activity, hunger, etc. in response to changes in weight or fat.
Set point Settling points and Bodyweight Regulation Part 1
A long standing debate in the world of obesity research revolves around the idea that bodyweight (or perhaps body fat) is regulated. What does that mean exactly?
Dieting Psychology Versus Dieting Physiology
That is to say, psychology impacts on physiology and physiology impacts on psychology and the days of pretending the body and mind are separate non-interacting entities are long, long gone. Again, I’ll make the separation primarily for reasons of convenience, it will save me some needless complexity in the upcoming discussion. Just keep in mind that it’s an artificial and non-existent separation in reality.
Fat Loss for Athletes: Part 3
The final issue I want to discuss regarding fat loss for athletes is how training can or should be modified while dieting. Again, this is a place where a lot of people make mistakes and where (especially given the role of anabolics in bodybuilding preparation since about the 80’s) following bodybuilders can be problematic. I’ll come back to this below.
