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# A recent study of people who had successfully lost weight

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16 Sep 2012, 00:01
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A recent study of people who had successfully lost weight and implemented regular exercise routines in their twenties found that, by the age of forty, most had gained back the weight, stopped exercising regularly, or both. Surprisingly, among the study's subjects who had hired personal trainers to help them lose weight and exercise in their twenties, an even higher percentage had regained the weight or stopped exercising than among subjects who had not hired such trainers. The researchers concluded not only that remaining on an effective weight management and exercise program is difficult, but also that personal trainers are largely ineffective in helping people to remain on an effective weight management and exercise program.

Which of the following, if true, most weakens the argument in the passage above?

A. Subjects in the study who had hired personal trainers had, on average, more free time to exercise than did those who had not hired such trainers.

B. Some people hire personal trainers for sport-specific training or to rehabilitate injuries, rather than to lose weight or implement a regular exercise program.

C. The average person's metabolism slows significantly between the ages of thirty and forty, making it more difficult for people aged forty or older to avoid weight gain.

D. Many of the personal trainers hired by the people in the study were also dietitians who helped their clients design meal plans.

E. Most people who hire personal trainers do so, at least in part, because they lack sufficient motivation to remain on a diet or exercise regimen by themselves.

[Reveal] Spoiler:
I selected option C because it targets the cause mentioned in the conclusion..... Can someone explain the correct ans?
[Reveal] Spoiler: OA

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Re: A recent study of people who had successfully lost weight [#permalink]

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16 Sep 2012, 01:22
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ravstime wrote:
A recent study of people who had successfully lost weight and implemented regular exercise routines in their twenties found that, by the age of forty, most had gained back the weight, stopped exercising regularly, or both. Surprisingly, among the study's subjects who had hired personal trainers to help them lose weight and exercise in their twenties, an even higher percentage had regained the weight or stopped exercising than among subjects who had not hired such trainers. The researchers concluded not only that remaining on an effective weight management and exercise program is difficult, but also that personal trainers are largely ineffective in helping people to remain on an effective weight management and exercise program.

Which of the following, if true, most weakens the argument in the passage above?

A. Subjects in the study who had hired personal trainers had, on average, more free time to exercise than did those who had not hired such trainers.
B. Some people hire personal trainers for sport-specific training or to rehabilitate injuries, rather than to lose weight or implement a regular exercise program.
C. The average person's metabolism slows significantly between the ages of thirty and forty, making it more difficult for people aged forty or older to avoid weight gain.
D. Many of the personal trainers hired by the people in the study were also dietitians who helped their clients design meal plans.
E. Most people who hire personal trainers do so, at least in part, because they lack sufficient motivation to remain on a diet or exercise regimen by themselves.

I selected option C because it targets the cause mentioned in the conclusion..... Can someone explain the correct ans?

Correct Choice is E.
According to C all subjects in the study will regain weight and there will be no difference between groups with PT and groups without PT.
The conclusion is "The researchers concluded not only that remaining on an effective weight management and exercise program is difficult, but also that personal trainers are largely ineffective in helping people to remain on an effective weight management and exercise program."
E brings out an alternate reasoning by showing that people with PT were partly lacking sufficient motivation to remain on diet & exercise. So the conclusion that PT are ineffective is falsified.
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Re: A recent study of people who had successfully lost weight [#permalink]

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17 Sep 2012, 02:13
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I strongly feel that B is the answer. E does not account for the increase in weight loss in the 40's alone.Well if the people who lack self motivation hired trainers ,why is that they gained weight only in the 40's and not earlier.It is no where mentioned that the recipients are not under the guidance of the trainers in their 40's .
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Re: A recent study of people who had successfully lost weight [#permalink]

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17 Sep 2012, 05:02
saikarthikreddy wrote:
I strongly feel that B is the answer. E does not account for the increase in weight loss in the 40's alone.Well if the people who lack self motivation hired trainers ,why is that they gained weight only in the 40's and not earlier.It is no where mentioned that the recipients are not under the guidance of the trainers in their 40's .

B does not differentiate the two groups and will not weaken the argument that personal trainers are largely ineffective in helping people to remain on an effective weight management and exercise program.

While E does tell has that its not the fault of trainers or that trainers are ineffective
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Re: A recent study of people who had successfully lost weight [#permalink]

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18 Sep 2012, 08:03
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ravstime wrote:
A recent study of people who had successfully lost weight and implemented regular exercise routines in their twenties found that, by the age of forty, most had gained back the weight, stopped exercising regularly, or both. Surprisingly, among the study's subjects who had hired personal trainers to help them lose weight and exercise in their twenties, an even higher percentage had regained the weight or stopped exercising than among subjects who had not hired such trainers. The researchers concluded not only that remaining on an effective weight management and exercise program is difficult, but also that personal trainers are largely ineffective in helping people to remain on an effective weight management and exercise program.

Which of the following, if true, most weakens the argument in the passage above?

A. Subjects in the study who had hired personal trainers had, on average, more free time to exercise than did those who had not hired such trainers.
B. Some people hire personal trainers for sport-specific training or to rehabilitate injuries, rather than to lose weight or implement a regular exercise program.
C. The average person's metabolism slows significantly between the ages of thirty and forty, making it more difficult for people aged forty or older to avoid weight gain.
D. Many of the personal trainers hired by the people in the study were also dietitians who helped their clients design meal plans.
E. Most people who hire personal trainers do so, at least in part, because they lack sufficient motivation to remain on a diet or exercise regimen by themselves.

I selected option C because it targets the cause mentioned in the conclusion..... Can someone explain the correct ans?

Premise - A recent study of people who had successfully lost weight and implemented regular exercise routines in their twenties found that, by the age of forty, most had gained back the weight, stopped exercising regularly, or both. Surprisingly, among the study's subjects who had hired personal trainers to help them lose weight and exercise in their twenties, an even higher percentage had regained the weight or stopped exercising than among subjects who had not hired such trainers.

Conclusion - The researchers concluded not only that remaining on an effective weight management and exercise program is difficult, but also that personal trainers are largely ineffective in helping people to remain on an effective weight management and exercise program.

Anything which weakens the conclusion is our answer

A. Subjects in the study who had hired personal trainers had, on average, more free time to exercise than did those who had not hired such trainers. (Irrelevant)
B. Some people hire personal trainers for sport-specific training or to rehabilitate injuries, rather than to lose weight or implement a regular exercise program. (Irrelevant)
C. The average person's metabolism slows significantly between the ages of thirty and forty, making it more difficult for people aged forty or older to avoid weight gain. (This should be common to all and not just to those who exercised or maintained trainer)
D. Many of the personal trainers hired by the people in the study were also dietitians who helped their clients design meal plans. (It does not help us in anyway, although close)
E. Most people who hire personal trainers do so, at least in part, because they lack sufficient motivation to remain on a diet or exercise regimen by themselves. (This is our answer, it shows that personal trainers were more of a source of motivation than just trainers. So by 40’s the people in the survey had no trainer and no motivation to do exercise and thus gained weight)

Hope this helps !

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Re: A recent study of people who had successfully lost weight [#permalink]

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25 Oct 2012, 02:24
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i think B and E both does the same thing showing third thing as the cause, but E wins just because it mentions the word "Most" and B mentions " Some"
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Re: A recent study of people who had successfully lost weight [#permalink]

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16 Nov 2013, 03:20

B a close contender, however it targets a wrong group by generalizing i.e " some people" while the argument claims that those who hire personal trainers are worse of those who do not. On the other hand, E address the flaw with people who hire personal trainers
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Re: A recent study of people who had successfully lost weight [#permalink]

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03 Feb 2014, 10:59
Archit143 wrote:
i think B and E both does the same thing showing third thing as the cause, but E wins just because it mentions the word "Most" and B mentions " Some"

I chose B ...I missed "some" and "most". Perfect reasoning.

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Re: A recent study of people who had successfully lost weight [#permalink]

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10 Aug 2014, 08:23
What about option C. It says that in the forties, the metabolism doesn't allow to loose weight easily and thus provides us with a third reason. Also there is two parts of the conclusion and both should be answered, so not only the PTs are being questioned but also the general effectiveness of the program.
Option C gives the explanation to both the parts.
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Re: A recent study of people who had successfully lost weight [#permalink]

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17 Oct 2015, 18:54
kushjoy wrote:
What about option C. It says that in the forties, the metabolism doesn't allow to loose weight easily and thus provides us with a third reason. Also there is two parts of the conclusion and both should be answered, so not only the PTs are being questioned but also the general effectiveness of the program.
Option C gives the explanation to both the parts.

kushjoy

I think C is out of scope because of the following quotation:

"concluded not only that remaining on an effective weight management and exercise program is difficult"

It doesn't matter whether the metabolism slows between age 30-40, there is still a way to lose weight, although it is more difficult. The only way to achieve weight loss is to work harder, and if a person lacks the motivation, then they will gain weight.

Does that help?
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Re: A recent study of people who had successfully lost weight [#permalink]

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20 Feb 2016, 01:18
But as per E, Trainers were appointed for motivation. But they failed, since people lack motivation just after the trainer stops guiding them.

The conclusion says trainers are ineffective in helping people to remain in the same weight. Hence this statement is strengthening the conclusion?
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Re: A recent study of people who had successfully lost weight [#permalink]

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16 Jul 2017, 07:32
A recent study of people who had successfully lost weight and implemented regular exercise routines in their twenties found that, by the age of forty, most had gained back the weight, stopped exercising regularly, or both. Surprisingly, among the study's subjects who had hired personal trainers to help them lose weight and exercise in their twenties, an even higher percentage had regained the weight or stopped exercising than among subjects who had not hired such trainers. The researchers concluded not only that remaining on an effective weight management and exercise program is difficult, but also that personal trainers are largely ineffective in helping people to remain on an effective weight management and exercise program.

Which of the following, if true, most weakens the argument in the passage above?

I am having doubt with respect to the following two options. Can someone please elaborate more on the following options

A. Subjects in the study who had hired personal trainers had, on average, more free time to exercise than did those who had not hired such trainers.
I am not getting at all what this option means and can do with respect to the conclusion in the above argument.

D. Many of the personal trainers hired by the people in the study were also dietitians who helped their clients design meal plans.
As per my understanding, if many of the personal trainers were also dietitians then they can not be largely ineffective in helping people instead they could be more effective. It weakens the conclusion. So, how is this option statement wrong, can anyone please explain?
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Re: A recent study of people who had successfully lost weight [#permalink]

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16 Jul 2017, 08:46
vnigam21 wrote:
A recent study of people who had successfully lost weight and implemented regular exercise routines in their twenties found that, by the age of forty, most had gained back the weight, stopped exercising regularly, or both. Surprisingly, among the study's subjects who had hired personal trainers to help them lose weight and exercise in their twenties, an even higher percentage had regained the weight or stopped exercising than among subjects who had not hired such trainers. The researchers concluded not only that remaining on an effective weight management and exercise program is difficult, but also that personal trainers are largely ineffective in helping people to remain on an effective weight management and exercise program.

Which of the following, if true, most weakens the argument in the passage above?

I am having doubt with respect to the following two options. Can someone please elaborate more on the following options

A. Subjects in the study who had hired personal trainers had, on average, more free time to exercise than did those who had not hired such trainers.
I am not getting at all what this option means and can do with respect to the conclusion in the above argument.

D. Many of the personal trainers hired by the people in the study were also dietitians who helped their clients design meal plans.
As per my understanding, if many of the personal trainers were also dietitians then they can not be largely ineffective in helping people instead they could be more effective. It weakens the conclusion. So, how is this option statement wrong, can anyone please explain?

Option A - Prethink: We want to look for an option where it says the personal trainer was effective. In option A, having more free time to exercise does not relate to the effectiveness of the personal trainer. Hence this option is irrelevant.

Option D - The conclusion talks about weight management (lose weight) and exercise. Helping someone design meal plans will make sure they are eating healthy food. It is possible that the weight may not increase further. However, the second line in the question talks about losing weight and exercising. How is the trainer helping in that? Nothing mentioned here.
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Re: A recent study of people who had successfully lost weight [#permalink]

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16 Jul 2017, 18:49
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Hi Varun,

Here are my thoughts:

vnigam21 wrote:
A. Subjects in the study who had hired personal trainers had, on average, more free time to exercise than did those who had not hired such trainers.
I am not getting at all what this option means and can do with respect to the conclusion in the above argument.

This option says that people (who hired personal trainers) had more time to exercise than other people. Now, if they had more time to exercise, they should have done better. However, from the passage, we know that these people (with trainers) actually did worse. Right? So, it only supports the conclusion.

vnigam21 wrote:
D. Many of the personal trainers hired by the people in the study were also dietitians who helped their clients design meal plans.
As per my understanding, if many of the personal trainers were also dietitians then they can not be largely ineffective in helping people instead they could be more effective. It weakens the conclusion. So, how is this option statement wrong, can anyone please explain?

Even if those personal trainers were Gods who could everything, the data given in the passage still stands as is. The data says that people with personal trainers performed even worse. Right?

Does it help?

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20 Jul 2017, 01:44
ravstime wrote:
A recent study of people who had successfully lost weight and implemented regular exercise routines in their twenties found that, by the age of forty, most had gained back the weight, stopped exercising regularly, or both. Surprisingly, among the study's subjects who had hired personal trainers to help them lose weight and exercise in their twenties, an even higher percentage had regained the weight or stopped exercising than among subjects who had not hired such trainers. The researchers concluded not only that remaining on an effective weight management and exercise program is difficult, but also that personal trainers are largely ineffective in helping people to remain on an effective weight management and exercise program.

Which of the following, if true, most weakens the argument in the passage above?

A. Subjects in the study who had hired personal trainers had, on average, more free time to exercise than did those who had not hired such trainers.

B. Some people hire personal trainers for sport-specific training or to rehabilitate injuries, rather than to lose weight or implement a regular exercise program.

C. The average person's metabolism slows significantly between the ages of thirty and forty, making it more difficult for people aged forty or older to avoid weight gain.

D. Many of the personal trainers hired by the people in the study were also dietitians who helped their clients design meal plans.

E. Most people who hire personal trainers do so, at least in part, because they lack sufficient motivation to remain on a diet or exercise regimen by themselves.

[Reveal] Spoiler:
I selected option C because it targets the cause mentioned in the conclusion..... Can someone explain the correct ans?

Bumping for further discussion. abhimahna could you please throw some light on this? I chose "C" but the above discussions don't satisfy me as to why "C" is wrong and why "E" is correct.
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Re: A recent study of people who had successfully lost weight [#permalink]

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20 Jul 2017, 07:47
I don't think option E is the answer. If the trainer itself not motivated then he won't be able to do so to his clients too. That is more or less strengthener, rather than weakner.

Option D looks good to me. It says trainer were themself dietian and able to help their client to do so a well. If we negate this, then it becomes the strengthener too. So, option D for me.

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Re: A recent study of people who had successfully lost weight [#permalink]

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13 Mar 2018, 19:59
mikemcgarry

Experts - can you please confirm why C is wrong ...

E seems to weaken only the underline portion of the argument but not the bold part of the argument

A recent study of people who had successfully lost weight and implemented regular exercise routines in their twenties found that, by the age of forty, most had gained back the weight, stopped exercising regularly, or both. Surprisingly, among the study's subjects who had hired personal trainers to help them lose weight and exercise in their twenties, an even higher percentage had regained the weight or stopped exercising than among subjects who had not hired such trainers. The researchers concluded not only that remaining on an effective weight management and exercise program is difficult, but also that personal trainers are largely ineffective in helping people to remain on an effective weight management and exercise program.

Which of the following, if true, most weakens the argument in the passage above?

a)Subjects in the study who had hired personal trainers had, on average, more free time to exercise than did those who had not hired such trainers.
b)Some people hire personal trainers for sport-specific training or to rehabilitate injuries, rather than to lose weight or implement a regular exercise program.
c)The average person's metabolism slows significantly between the ages of thirty and forty, making it more difficult for people aged forty or older to avoid weight gain.
d)Many of the personal trainers hired by the people in the study were also dietitians who helped their clients design meal plans.
e)Most people who hire personal trainers do so, at least in part, because they lack sufficient motivation to remain on a diet or exercise regimen by themselves
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Re: A recent study of people who had successfully lost weight [#permalink]

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15 Mar 2018, 17:23
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jabhatta@umail.iu.edu wrote:
mikemcgarry

Experts - can you please confirm why C is wrong ...

E seems to weaken only the underline portion of the argument but not the bold part of the argument

A recent study of people who had successfully lost weight and implemented regular exercise routines in their twenties found that, by the age of forty, most had gained back the weight, stopped exercising regularly, or both. Surprisingly, among the study's subjects who had hired personal trainers to help them lose weight and exercise in their twenties, an even higher percentage had regained the weight or stopped exercising than among subjects who had not hired such trainers. The researchers concluded not only that remaining on an effective weight management and exercise program is difficult, but also that personal trainers are largely ineffective in helping people to remain on an effective weight management and exercise program.

Which of the following, if true, most weakens the argument in the passage above?

a)Subjects in the study who had hired personal trainers had, on average, more free time to exercise than did those who had not hired such trainers.
b)Some people hire personal trainers for sport-specific training or to rehabilitate injuries, rather than to lose weight or implement a regular exercise program.
c)The average person's metabolism slows significantly between the ages of thirty and forty, making it more difficult for people aged forty or older to avoid weight gain.
d)Many of the personal trainers hired by the people in the study were also dietitians who helped their clients design meal plans.
e)Most people who hire personal trainers do so, at least in part, because they lack sufficient motivation to remain on a diet or exercise regimen by themselves

Hi jabhatta@umail.iu.edu!

Happy to help

This is tricky, because we need to infer some context from the passage here. The passage starts off by stating that most people gain back weight that they had lost when they were younger. This is just background, contextual information. The argument really starts with the second line: Surprisingly, among the study's subjects who had hired personal trainers to help them lose weight and exercise in their twenties, an even higher percentage had regained the weight or stopped exercising than among subjects who had not hired such trainers. This is the main discrepancy that the argument is focusing on, not the fact that people gain weight as they get older -- that's not surprising. The argument is basically taking it as a given that remaining on an effective weight management and exercise program is difficult. That isn't really part of the conclusion, it just provides the basis for the conclusion to jump off from. The main conclusion here is that personal trainers are largely ineffective in helping people to remain on an effective weight management and exercise program.

When we see the structure: "not only...but also", then it is often the case that the part following "not only" is something that is already widely accepted as fact. The main argument lies in the second part, following "but also", which is what is emphasized. Usually, context clues from the rest of the argument (as here) can help us determine when this is the case. So choice C doesn't address the main part of the argument.

Hope that helps!
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Re: A recent study of people who had successfully lost weight [#permalink]

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01 Apr 2018, 10:23
MagooshExpert wrote:

Happy to help

This is tricky, because we need to infer some context from the passage here. The passage starts off by stating that most people gain back weight that they had lost when they were younger. This is just background, contextual information. The argument really starts with the second line: Surprisingly, among the study's subjects who had hired personal trainers to help them lose weight and exercise in their twenties, an even higher percentage had regained the weight or stopped exercising than among subjects who had not hired such trainers. This is the main discrepancy that the argument is focusing on, not the fact that people gain weight as they get older -- that's not surprising. The argument is basically taking it as a given that remaining on an effective weight management and exercise program is difficult. That isn't really part of the conclusion, it just provides the basis for the conclusion to jump off from. The main conclusion here is that personal trainers are largely ineffective in helping people to remain on an effective weight management and exercise program.

When we see the structure: "not only...but also", then it is often the case that the part following "not only" is something that is already widely accepted as fact. The main argument lies in the second part, following "but also", which is what is emphasized. Usually, context clues from the rest of the argument (as here) can help us determine when this is the case. So choice C doesn't address the main part of the argument.

Hope that helps!
-Carolyn

Thank you, this was really helpful in understanding why C isn't the right answer. Damn it, CR is BRUTAL.
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Re: A recent study of people who had successfully lost weight [#permalink]

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01 Apr 2018, 15:55
sidvarma wrote:
Thank you, this was really helpful in understanding why C isn't the right answer. Damn it, CR is BRUTAL.

Hi sidvarma,

Glad I could help! GMAT CR can definitely be rough!! Here are a few articles that discuss general strategies for dealing with CR questions like this one, in case they're helpful

-Carolyn
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Re: A recent study of people who had successfully lost weight   [#permalink] 01 Apr 2018, 15:55
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