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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
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The 5 things you need to know about Basal Metabolic Rate (Metabolism)
-(1) The higher your BMR, the easier it is to lose weight
-(2) Your Basal Metabolic Rate decreases when you go on a diet wh
ich has fewer calories than your normal diet
-(3) Your BMR increases in response to increased physical activity
-(4) Exercise is the ONLY effective way to increase your BMR
-(5) Obesity is no
t caused by a slow BMR
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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
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An increase metabolism provides many benefits to help maintain continuous and permanent weight loss:
-less exercise would be needed - giving you more time
-less effort if you did exercise - no n
eed to try burning lots of calories during each session!
-less chance of weight regain later
-still enjoy some favorite foods - no need to be as strict on the diet
-less time spent preparing
low / non fat recipes and meals
-save money from not needing to buy all the expensive low fat varieties
-more chance majority of weight loss is fat rather than water
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Factors that affect speed of metabolism
-BODY SIZE:
-WEIGHT GAIN
-BODY COMPOSITION:
-SEX:
-AGE
-DRUGS
-HEREDITARY
-HORMONES
-PSYCHOLOGICAL STATE
-TEMPERATURE
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Basal Metabolic Rate (BMR)
-In order to compare one person's metabolism with another's, scientists have devised a new buzz word - basal metabolic rate (BMR). Your BMR is the rate at which you use u
p energy when at rest - e.g. when you are sleeping or just lying in bed. You might call it your tick over speed.
- The more you weigh the higher your BMR will be. The metabolic rate of very fat wom
en is 25% higher than that of thin women.
- BMR is much greater in childhood than in adulthood. After the age of about 20, it drops about 2 per cent, per decade.
- People whose bodies contai
n a higher proportion of muscle to fat, tend to have a higher BMR than those with lower muscular proportions - all other things being equal.
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To Continue
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