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One of the limiting factors in human physical performance is the amoun

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One of the limiting factors in human physical performance is the amoun  [#permalink]

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New post Updated on: 06 Jan 2019, 13:24
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One of the limiting factors in human physical performance is the amount of oxygen that is absorbed by the muscles from the bloodstream. Accordingly, entrepreneurs have begun selling at gymnasiums and health clubs bottles of drinking water, labeled “SuperOXY,” that has extra oxygen dissolved in the water. Such water would be useless in improving physical performance, however, since the only way to get oxygen into the bloodstream so that it can be absorbed by the muscles is through the lungs.

Which of the following, if true, would serve the same function in the argument as the statement in boldface?


(A) the water lost in exercising can be replaced with ordinary tap water

(B) the amount of oxygen in the blood of people who are exercising is already more than the muscle can absorb

(C) world-class athletes turn in record performance without such water

(D) frequent physical exercise increases the body’s ability to take in and use oxygen

(E) lack of oxygen is not the only factor limiting human physical performance


Similar Question : LINK

The boldface statement is weakening the argument above, so we need to look for weakener so A or E, finally, i picked E....views???

Originally posted by singh_amit19 on 24 Sep 2007, 11:59.
Last edited by Bunuel on 06 Jan 2019, 13:24, edited 5 times in total.
Renamed the topic and edited the question.
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Re: One of the limiting factors in human physical performance is the amoun  [#permalink]

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New post 23 Nov 2010, 15:26
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msand wrote:
One of the limiting factors in human physical performance is the amount of oxygen that is absorbed by the muscles from the bloodstream. Accordingly, entrepreneurs have begun selling at gymnasiums and health clubs bottles of drinking water, labeled “SuperOXY,” that has extra oxygen dissolved in the water. Such water would be useless in improving physical performance, however, since the only way to get oxygen into the bloodstream so that it can be absorbed bye the muscles is through the lungs.
Which of the following, if true, would serve the same function in the argument as the statement in boldface?
A. the water lost in exercising can be replaced with ordinary tap water
B. the amount of oxygen in the blood of people who are exercising is already more than the muscle can absorb
C. world-class athletes turn in record performance without such water
D. frequent physical exercise increases the body’s ability to take in and use oxygen
E. lack of oxygen is not the only factor limiting human physical performance
OA :


Definitely an interesting boldface question.
I read the question stem first. I understand that I need to find the function of the statement in bold. Then I need to find an option that will play the same function, if it is incorporated in the argument.

Conclusion: 'SuperOXY' water would be useless in improving physical performance.

The bold portion "the only way to get oxygen into the bloodstream so that it can be absorbed bye the muscles is through the lungs" is a premise supporting the conclusion.

So I have to find the option that, if incorporated in the argument, will also function as a premise i.e. it will also support the conclusion. So in short, I am trying to find the option that strengthens the conclusion.

Option (A) is incorrect because it says that water lost can be replaced by tap water. It doesn't say how or why SuperOXY is useless in improving physical performance.
Option (B) says that amount of oxygen is already more than what the muscles can absorb. This means drinking SuperOXY will not improve physical performance because muscles anyway cannot absorb the extra oxygen. This option strengthens the conclusion. Hence this is the answer.
Option (C) says that people turn in great performance without this water. But it doesn't say that this water cannot further improve their performance.
Option (D) says that frequent physical exercise increases the body’s ability to take in and use oxygen. It doesn't say anything about how this water does not improve performance.
Option (E) says there are other factors affecting human physical performance but doesn't say that SuperOXY doesn't affect human physical performance.
Answer (B)
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Re: One of the limiting factors in human physical performance is the amoun  [#permalink]

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New post 23 Nov 2010, 13:45
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You have to attack the main argument here. The main argument says that these waters are trying to replenish the body's oxygen content and promote physical performance. So you need to find an answer choice that says that even if this water contains the oxygen, it's not going to assimilated.

A is wrong because that says, "Okay you can ALSO do this by using tap water" which is not the same as saying "You CANNOT do this by using this OXY water".

B makes sense because it gives an alternate explanation as to why this product will fail. If the body is already at the maximum level of oxygen absorbency, no matter how much oxygen this water contains, it'll all be wasted.

C is absolutely irrelevant. If world class athletes can do it without this water, again, that doesn't mean that this water doesn't help in performance. It could just mean that they don't need that extra boost.

D in fact, strengthens the argument instead of weakening it by saying the body's ability to oxygen intake increases.

E seems to be an actual answer, but the problem with this is, even if there are other factors and oxygen unavailability IS one factor, then by providing more oxygen you're breaking down one of the factors even if it means that your performance goes up a tiny bit. Incomplete answer.

I hope this helps.
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Re: One of the limiting factors in human physical performance is the amoun  [#permalink]

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New post 26 Sep 2009, 02:25
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I'd bet for 'B':

Premise 1: One of the limiting factors in human physical performance is the amount of oxygen
that is absorbed by the muscles
from the bloodstream.
Premise 2: ...entrepreneurs have begun selling bottles of drinking water, labeled
“SuperOXY,” that has extra oxygen dissolved in the water
Premise 3: the only way to get oxygen into the bloodstream so that it can be absorbed by the muscles is
through the lungs =>
Conclusion: Such water ("SuperOXY") would be useless in improving physical performance

improving physical performance = get rid of the limiting factors
1 of the limiting factors = quantity of oxygen that is absorbed by the muscles (from premise 1)
Assumption: to drink "SuperOXY" = to provide oxygen to the muscles = improve physical performance
Premise 3 destroys such assumption and provides evidence for the conclusion

'B' also destroys such assumption and provides evidence for the conclusion because the fact that "amount of oxygen in the blood of people who are exercising is already more than the muscle can absorb" makes any additional oxygen unnecessary and as a consequence makes "SuperOXY" useless in improving physical performance

'A' on the other hand actually is out of scope because we don't know whether the fact that "the water lost in exercising can be replaced with ordinary tap water" makes "SuperOXY" useless in improving physical performance. :wink:
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New post 08 Oct 2009, 12:29
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I think the answer to this question is B because the statement in boldface suggects
one of the reason why such water would not be usefull in physical performance. Option
B suggect another rason thatsince oxygen is alrady sufficient sufficient for muscles to absorb,
such water will be useleass.
A should be wrong because ordinary tap water can replace the water does not mean SuperOXY become useless.
For example, A medicine curing an desease does not implies that other medicine curing the same desease will become useless.
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Re: One of the limiting factors in human physical performance is the amoun  [#permalink]

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New post 02 Jan 2010, 17:58
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I'll try, my friend. OA is B because of the way the argument is set up. The bold text is the evidence to the claim that drinking water with oxygen in it won't help out physical performance. So out of the answer choices we're trying to find something else that would be used as evidence to support the same claim. Therefore, if we didn't know that oxygen in the stomach doesn't help it get absorbed to the muscles because it's not through the lungs which answer would make sense? It's B because B means that the body doesn't need MORE oxygen. Rather it needs to BETTER absorb the oxygen it already has. It's completely different evidence but if it's true then drinking oxygen in your water would just give more oxygen and the body wouldn't be able to absorb it and use it for enhanced performance. Does that make sense?

D is a true statement but it does not do anything for the argument. Frequent exercise has nothing to do with disproving the effectiveness of drinking water with oxygen it to ultimately help out muscle performance. It just has to do with muscle performance it self.
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New post 23 Nov 2010, 20:45
another problem with e seems to be that it is just paraphrasing what is already given in the argument. the argument starts off by saying: "One of the limiting factors" - so we already know there are other factors.. whats the point of having E? i eliminated e on that basis... not sure if that was the right approach though...
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Re: One of the limiting factors in human physical performance is the amoun  [#permalink]

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New post 24 Nov 2010, 05:36
gmat1011 wrote:
another problem with e seems to be that it is just paraphrasing what is already given in the argument. the argument starts off by saying: "One of the limiting factors" - so we already know there are other factors.. whats the point of having E? i eliminated e on that basis... not sure if that was the right approach though...


Sure it makes sense. An option acting as a premise will have new information. Option (E) here doesn't. Good call.
Just be aware that sometimes what seems a rehash may actually be new. So be careful when eliminating options on that basis.
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New post 24 Nov 2013, 14:09
Do not agree with choice A here. I would go with B.

Conclusion:
Such water would be useless in improving physical performance, however, since the only way to get oxygen into the bloodstream so that it can be absorbed bye the muscles is through the lungs.

We need to provide an alternate reasoning to prove that such water is useless in improving physical performance, which is related to the amount of oxygen absorbed by the muscles from the bloodstream.

A. the water lost in exercising can be replaced with ordinary tap waterThis choice tells that the water lost during exercising can be replaced with ordinary water but does not give any information about improvement in physical performance after replacement.
B. the amount of oxygen in the blood of people who are exercising is already
more than the muscle can absorbThis choice exactly points that the amount of oxygen present in the people who exercise is already more and hence undermines the idea to use "SuperOXY" water to improve physical performance.
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