| Metabolism 101 |
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Ball
Restricted Member
| Joined: | 28 Aug 2006 |
| Location: | |
| Posts: | 37 |
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Posted: 6 Sep 2006 01:23 am |
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This site has a metabolic calculator. It does not lies.
Human resting metabolic rates vary little. Plus or minus 5% is about it.
Anyone who clamims to be mystified because their weighloss has leveled off is simply eating the required calories needed to maintain that weight.
This is the metabolic rate to a 30 year old 125 lb sedentary female
- Resting (basal) metabolic rate: 1212 calories per day
- Typical daily activities: 591 calories per day
- Total calories burned: 1803 per day
This is the metabolic rate for a 125 pound moderately active 30 yearold female.
- Resting (basal) metabolic rate: 1212 calories per day
- Typical daily activities: 623 calories per day
- Total calories burned: 1835 per day
This is the metabolic rate of a 30 yearold 300lb female female couch potato.
- Resting (basal) metabolic rate: 2909 calories per day
- Typical daily activities: 1309 calories per day
- Total calories burned: 4219 per day
As you can plainly see the bigger a person is the fast they will lose weight. You can also see that in order to maintain a weight of 300 lbs one must eat like a pig.
Here is the metabolic rate for a moderately active 30 yearold 300 pound female.
- Resting (basal) metabolic rate: 2909 calories per day
- Typical daily activities: 1554 calories per day
- Total calories burned: 4464 per day
Now for a little quiz
Who burns more calories?
A. A 100 pound person ascending a flight of stairs
B A 300 pound person ascending a flight of stairs
C. Both burn the same
D. There is no way to know
A calorie is
A. Microscopic form of fuel in the cells.
B. A measurement of heat.
C. Both A & B
D. None of the above
The percentage of overweight people in the US is about.
A. 35%
B. 25%
C. 45% and shrinking
D. 65% and growing
People are overweight because
A. They have slow metabolisms.
B. They are too short for their weight
C. They are eating too many carbs
D. They are consuming more calories than they are burning and the excess gets stored as body fat.
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jillybean720
Senior Member
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Posted: 6 Sep 2006 09:06 pm |
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What you're saying isn't flat out wrong, but it DOES vary from individual to individual. It has been scientifically proven that someone who has "dieted" (as in, gone ON a diet, such as a fad diet, rather than made a healthy lifestyle change) very well could have lowered/slowed their metabolism. In fact, studies have shown that even if 2 people (let's pretend they're twins, so they are the same height, same build, same genes...) weigh the same exact amount, they could still have drastically different metabolic rates. If one of them used to be overweight/obese and had to lose weight to reach his current weight, then he now burns fewer calories than the other who has never been overweight.
General calculators should be used as a guideline, but not as the be-all, end-all of calorie calculations. It's a good starting point, but everything needs to be adjusted to fit one's own individual needs.
I know women who have had their metabolic rates medically tested. One woman who stands out in my mind in particular weighed about 300 pounds and had an RMR of only about 1600 calories. She'd been eating about 2000 daily hoping to lose weight...no wonder it wasn't working very well.
I'm sure you won't believe me since you are so self-assured, but there IS a reason why one type of diet does not work for every person.
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Nir
Senior Administrator
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Posted: 6 Sep 2006 11:55 pm |
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1. I'm intrigued by the method you use to calculate 'Typical daily activities'. Regardless of whether you describe a person as "couch potato", "sedentary" or "moderately active", the multiplication factors you appear to be using are in the rather narrow range of 1.45 (lowest) .. 1.53 (highest). Variation of 5.8%. Compare for instance with factors given in BFFM (sedentary: 1.2, moderate exerciser 1.375, variation is 14.6%). Perhaps you can share the formula you're using?
Human resting metabolic rates vary little. Plus or minus 5% is about it.
2. jillybean720 has a point. There are some additional complexities that you have either glossed over. Let me spell them out: some people are over-enthusiastiac about weight loss. Impatient, if you will. They restrict their calories dramatically, sometimes simultaneously increasing activity. They are delighted with their short-term results but meanwhile the clock is ticking and then their metabolism adjusts to the severe calorie restriction by becoming more efficient - requiring fewer calories to sustain the same lifestyle. For a further explanation, you might find the following tutorial topic helpful: What It Takes to Lose It All
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