Calorie Intake

[John12345]

Obviously I'm a new member and have a quick question though I will give a little back story. I'm an 18 year old male weighing in at 300lbs. I've been overweight from the age of 12 but not from eating, yet drinking soda. I recently quit soda all together and decided to start exercising and cutting down on food. For the past 5 days I have been riding a stationary bike at 16mph for one hour everyday and eating 800-1000 calories per day. Now I know I will get heat for saying that but the thing is... Well.. I don't feel hungry. I don't feel like I'm starving myself and to consume more I would actually need to eat when I'm not hungry. Like I said I gained weight from soda, not food.

A forum member named Steve posted about leptin a while ago and "starvation mode".

This said though, when you have a lot of excess fat, the starvation response mechanism is not so easily triggered. When you have plenty of fat, you have plenty of leptin, and this tells your body that you are in no danger of starving. As fat is lost, leptin goes down, and vice versa.

I guess my question is, is this accurate? Will I not have to worry about starvation mode till I lose a fair bit of weight or will I have to make myself to eat more?

 

[ladyrose2008]

Leptin/Starvation Mode

Leptin (from the Greek word leptos, meaning thin) is a 16 kDa protein hormone that plays a key role in regulating energy intake and energy expenditure, including the regulation (decrease) of appetite and (increase) of metabolism.

At present it is not known how important leptin is in control of human body weight. The amount produced per fat cell also increases with greater obesity. This rise in leptin should act over time to stem the amount of food eaten by an obese person. In reality, obese people have a blunted response to leptin and appear to be resistant to its effects. Leptin - Wikipedia, the free encyclopedia

Many people think that starving themselves will lead to fast weight loss. A starvation diet does not mean the absence of food. It means cutting the total caloric intake to less than 50% of what the body requires. The body responds by using its own reserves to provide energy, and these reserves are not just the body`s extra fat. Initially, glycogen stores are broken down for energy. Glycogen is the storage form of carbohydrate in our body. There is little glycogen available so this energy source is depleted during the first hours of starvation. When glycogen is used, water is released which is noticed as a drop in weight on the scale.
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