What is the logic of the argument below? Physical trainers : GMAT Critical Reasoning (CR)
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# What is the logic of the argument below? Physical trainers

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What is the logic of the argument below? Physical trainers [#permalink]

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23 Dec 2012, 23:27
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What is the logic of the argument below?

Physical trainers have found that when aerobics experts, who tend to have relatively high metabolic rates, gain
weight by increasing the number of calories they consume, their metabolisms continue to be higher than average.
They will thus burn more calories at their new weight than do people for whom the new weight is normal. As a result,
aerobics experts will ultimately lose the newly gained weight until their weight matches their high metabolic rate.

The conclusion of the argument above depends on which of the following assumptions?

(A) Physical trainers disagree over whether metabolic rates can be increased or decreased through the use of
targeted hormone treatments.
(B) The metabolisms of people who are not aerobics experts are more variable than the metabolisms of people who
have been aerobic experts.
(C) People who are at their usual weights find it equally difficult to gain or to lose weight due to the constant speed
of their metabolisms.
(D) Not many aerobics experts who have gained weight by increasing caloric intake continue to consume substantially
more calories than do people for whom the higher weight is normal.
(E) The number of calories that an individual burns in a day is determined by the amount consumed that day and
not by the individual's current weight.
[Reveal] Spoiler: OA

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Re: Physical trainers have found that when aerobics experts [#permalink]

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23 Dec 2012, 23:58
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A defender assumption question, though not much preferred by GMAT.

Bull,
Consider their metabolic rate 25kCal/hour. Now if the experts start consuming the calories at a rate higher than their metabloic rate, what will happen. These calories will start accumulating and hence will result in weight gain.
Negating D, yields you the same explanation.
The choice has mentioned the people who consider higher weight normal in order to emphasize that if these people will consider higher weight normal, then they will continue to consume more calories because they would be thinking that it is still not in excess. Now if the aerobic experts consume calories at a rate higher than the rate of the people who consider higher weight normal, then naturally aerobic experts too will gain weight.

+1D
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Re: What is the logic of the argument below? Physical trainers [#permalink]

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04 Nov 2013, 06:04
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I neither understood the question, nor I did I understand the answer.
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Re: What is the logic of the argument below? Physical trainers [#permalink]

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09 Nov 2013, 04:32
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Hi,

Facts: 1) Aerobic experts have higher metabolic rates than normal people.
So to gain weight they need to consume more calories than the people for whom this weight is normal

Conclusion : "aerobics experts will ultimately lose the newly gained weight until their weight matches their high metabolic rate"

For the conclusion to hold true our assumption must support it.

(A) Physical trainers disagree over whether metabolic rates can be increased or decreased through the use of
targeted hormone treatments. What ? Out of Scope
(B) The metabolisms of people who are not aerobics experts are more variable than the metabolisms of people who
have been aerobic experts. Can we even say that, also how does this help me reach the conclusion
(C) People who are at their usual weights find it equally difficult to gain or to lose weight due to the constant speed
of their metabolisms. Not relevant, Not related to the conclusion, We don't know anything about whether they are equally difficult or is one thing more difficult than the other.
(D) Not many aerobics experts who have gained weight by increasing caloric intake continue to consume substantially
more calories than do people for whom the higher weight is normal.Correct, This option says that aerobic experts do eventually consume less or same amount of calories than people with higher weight, otherwise they won't be able to reduce their weight.
(E) The number of calories that an individual burns in a day is determined by the amount consumed that day and
not by the individual's current weight.Out of scope, irrelevant

Hope this helps.
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Re: What is the logic of the argument below? Physical trainers [#permalink]

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16 Aug 2014, 18:15
ramannanda9 wrote:
Hi,

Facts: 1) Aerobic experts have higher metabolic rates than normal people.
So to gain weight they need to consume more calories than the people for whom this weight is normal

Conclusion : "aerobics experts will ultimately lose the newly gained weight until their weight matches their high metabolic rate"

For the conclusion to hold true our assumption must support it.

(A) Physical trainers disagree over whether metabolic rates can be increased or decreased through the use of
targeted hormone treatments. What ? Out of Scope
(B) The metabolisms of people who are not aerobics experts are more variable than the metabolisms of people who
have been aerobic experts. Can we even say that, also how does this help me reach the conclusion
(C) People who are at their usual weights find it equally difficult to gain or to lose weight due to the constant speed
of their metabolisms. Not relevant, Not related to the conclusion, We don't know anything about whether they are equally difficult or is one thing more difficult than the other.
(D) Not many aerobics experts who have gained weight by increasing caloric intake continue to consume substantially
more calories than do people for whom the higher weight is normal.Correct, This option says that aerobic experts do eventually consume less or same amount of calories than people with higher weight, otherwise they won't be able to reduce their weight.
(E) The number of calories that an individual burns in a day is determined by the amount consumed that day and
not by the individual's current weight.Out of scope, irrelevant

Hope this helps.

I agree with you the explanation for D. But I disagree for E. E is relevant but incorrect option. It is and anti-assumption. If option E were true then the conclusion falls apart. That is why option E is wrong.
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Re: What is the logic of the argument below? Physical trainers [#permalink]

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08 Sep 2014, 06:25
I'm having a problem with D.
D says that "most aerobics experts..."
How do we determine if the question itself is only talking about some and not all of the aerobics experts?
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Re: What is the logic of the argument below? Physical trainers [#permalink]

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17 Sep 2014, 09:16
I have also the same problem in determining whether the argument is talking about all aerobic experts or some aerobic experts. This is also to be considered that all other options are out of scope or irrelevant except "E". Option E seemed tempting to me. Kindly shed some light on this question.
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Re: What is the logic of the argument below? Physical trainers [#permalink]

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18 Sep 2015, 11:14
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Re: What is the logic of the argument below? Physical trainers [#permalink]

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21 Sep 2015, 22:36
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gmatbull wrote:
What is the logic of the argument below?

Physical trainers have found that when aerobics experts, who tend to have relatively high metabolic rates, gain
weight by increasing the number of calories they consume, their metabolisms continue to be higher than average.
They will thus burn more calories at their new weight than do people for whom the new weight is normal. As a result,
aerobics experts will ultimately lose the newly gained weight until their weight matches their high metabolic rate.

The conclusion of the argument above depends on which of the following assumptions?

(A) Physical trainers disagree over whether metabolic rates can be increased or decreased through the use of
targeted hormone treatments.
(B) The metabolisms of people who are not aerobics experts are more variable than the metabolisms of people who
have been aerobic experts.
(C) People who are at their usual weights find it equally difficult to gain or to lose weight due to the constant speed
of their metabolisms.
(D) Not many aerobics experts who have gained weight by increasing caloric intake continue to consume substantially
more calories than do people for whom the higher weight is normal.
(E) The number of calories that an individual burns in a day is determined by the amount consumed that day and
not by the individual's current weight.

Arrived at D by elimination but then D is not a very easy choice to understand. All the question stem says is that aerobics experts have higher than average metabolic rate at any given weight. So if they have to maintain a higher weight consistently, they have to keep consuming more calories than normal folks. The question stem however says that it doesn't happen and aerobic experts fall back somewhere close to their original weights after a while. Which means that they don't keep consuming more calories consistently. Which is the same as D.
Re: What is the logic of the argument below? Physical trainers   [#permalink] 21 Sep 2015, 22:36
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