|
|
living things must have an unceasing supply of energy and matter. The transformation of this energy and matter within the body is called metabolism.
-Catabolism
-Catabolism is destructive metab
olism. Typically, in catabolism, larger organic molecules are broken down into smaller constituents. This usually occurs with the release of energy (usually as ATP).
-Anabolism
-Anabolism is co
nstructive metabolism. Typically, in anabolism, small precursor molecules are assembled into larger organic molecules. This always requires the input of energy (often as ATP).
| |
The entire metabolic process is run by biological catalysts known as enzymes. They are long, chain-like protein molecules that are twisted into characteristic three-dimensional shapes. Enzyme molecule
s function rather like templates to hold reacting molecules together in the proper position to speed their interactions. If your enzymes lose their shape ("denature"), they stop functioning, your meta
bolism ceases, and you're dead. Birds are no different. That's why boiling kills; it denatures enzymes.
|
Even if more exercise is undertaken a net loss of protein can occur if calorie intake is low.
-Remember dieters reduce their calorie intake but exercise uses extra carbs so the body must breakdown
extra protein to convert into carbohydrates. More carbs are needed because a less fit individual often has an untrained cardiovascular system and cannot supply enough oxygen for cells to burn fat for
energy during the exercise. Also if no exercise is performed the body has no need to use extra body fat because so little energy is required when inactive.
-Exercise can increase metabolism but the
trick for the unfit person is to perform the correct exercise and not cut calories too much too soon. To lose FAT weight fast the best way is to prepare the body by increasing the metabolism BEFORE c
|
|
|
|
How does Human Metabolism Work?- Thermic Effect of Food (TEF)
-The body uses energy to digest and absorb the nutrients present in the food we eat. The rate of energy used for the TEF is about 10%,
it can be increased depending on the composition of each meal.
-The TEF causes much confusion when dieters calculate calories in and out. For example;
-If we overeat the TEF actually increases
due to more food to digest, the stomach and intestines have to work harder and longer. It means if we ate an extra 3500 calories ( number of calories per pound of fat ) we wouldn't actually gain 1 pou
nd of body fat because the TEF has to be accounted for, we would gain less.
-The opposite also happens if we cut 3500 calories to lose 1 pound. The TEF decreases because there would be less food/n
| |
From the viewpoint of diet and weight loss, metabolism is the process whereby the body converts food into energy (or uses it for bodily repairs) or stores it as fat for future use. In simple terms, if
we have a faster metabolism we burn calories more efficiently and store less fat. If we have a slower metabolism we burn calories less efficiently and therefore store more calories as fat. In very si
mple terms, our Metabolic Rate is the rate (and efficiency) with which our body performs these metabolic tasks.
|
Increase the metabolism for less chance of water weight loss!
-If more protein is lost more water is also lost because protein holds four times its weight in water. Think about if a person lost 5 p
ounds in a week, that would require an extra 17500 calories so how could all this weight possibly be fat. In fact over a week only about 1 pound of the 5 pounds lost would be fat, the rest would be mo
stly water!
-Protein and its fluid replacement is the main reason many dieters regain weight after a diet. Again think about if someone regained 4 pounds in a week then does it mean that person has
eaten an extra 14000 calories?
-Increasing the metabolism means the body has a reason to hold onto protein thus less water is lost
|
|
