LSAT Explanation PT 26, S3, Q7: Lack of exercise produces the same

LSAT Question Stem

Which one of the following provides a logical completion to the passage above? 

Logical Reasoning Question Type

This is a Main Conclusion question. 

Correct Answer

The correct answer to this question is E. 

LSAT Question Complete Explanation

First, let's analyze the argument in the passage. The structure of the argument is as follows:

Premise 1: Lack of exercise produces the same or similar bodily effects as aging.

Premise 2: The physical changes that accompany aging can often be slowed down by appropriate exercise.

Premise 3: No drug holds any promise for slowing down the changes associated with aging.

Conclusion: _______.

The question type is Main Conclusion, which means we need to find the answer choice that provides a logical completion to the argument, using the premises provided in the passage.

Now, let's go through each answer choice:

a) Taking drugs has the same effect on aging as does a lack of exercise.

- This answer choice is not supported by the premises. While the passage says that no drug can slow down the changes associated with aging, it doesn't say that taking drugs has the same effect as not exercising.

b) People who do not exercise are likely to need drugs to sustain their health.

- This answer choice is not a reasonable inference from the premises. The passage doesn't discuss the need for drugs in people who do not exercise.

c) Appropriate exercise can prevent the physical changes associated with aging.

- This answer choice is incorrect because it overstates the effect of exercise. The passage says that exercise can slow down the physical changes associated with aging, not prevent them entirely.

d) People who do not exercise when they are young will gain few benefits from beginning to exercise at a later age.

- This answer choice is not supported by the premises. The passage doesn't discuss the benefits of starting exercise at a later age.

e) If the physical changes of aging are to be slowed, it is more practical to rely on exercise than on drugs.

- This answer choice is correct because it logically follows from the premises. The passage states that exercise can slow down the physical changes associated with aging, while no drug holds any promise for doing so. Therefore, it is more practical to rely on exercise than on drugs to slow down the physical changes of aging.

In conclusion, the correct answer is E, as it provides a logical completion to the passage using the premises provided.