Reading ComprehensionDifficulty: Medium

PT147 S2 P1 Q6 Explanation

Muscle Memory

A free, expert breakdown of this official LSAT Reading Comprehension question.

TopicsAuthor OpinionScience

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Passage

Passage A Muscle memory is a puzzling phenomenon. Most bodybuilders have experienced this phenomenon, yet virtually no discussions of it have appeared in scientific publications. Bodybuilders who start training again after a period of inactivity find that gaining muscle size seems easier the second time around—even if athletes observing muscle memory, some plausible explanation must exist.

One potential explanation of muscle memory involves the neurons (nerve cells) that stimulate your muscles, telling the muscle fibers to contract. It is well established that during weight lifting, only a small percentage of neurons for the working muscles are recruited. The more weight you lift, the more neurons are involved and you may think you’re starting from the same place, this greater strength would enable faster progress.

Then again, it’s also possible that the ease of retraining has nothing to do with your muscles: it could all be in your head. The first time you trained, you didn’t know how much you could lift. So you increased weight cautiously. When retraining, you already know you can handle increasing weight These more rapid weight increases produce quicker gains in strength and size.

Passage B Pumping up is easier for people who have been buff before, and now scientists think they know why— muscles retain one aspect of their wither from lack of use.

Because muscle cells are huge, more than one nucleus is needed for making the large amounts of the proteins that give muscles their strength. Previous research has demonstrated that with exercise, muscle cells get even bigger by merging with stem cells that are nested between them. The muscle cells incorporate the nuclei extra cell nuclei are killed by a cell death program called apoptosis.

In a recent study, researchers regularly stimulated the leg muscles of mice over a two-week period, during which time the muscle cells gained nuclei and increased in size. The researchers then let the muscles rest. As the muscles atrophied, the cells deflated to about 40 percent of their bulked-up size, but the muscle proteins again, providing a type of muscle memory at the cellular level.

What this question is testing

Author Opinion

Your task

Pin down exactly what the question asks about the passage — a detail, the author's view, the structure, or the main point — before looking at the choices.

Common trap

Answers that restate a true detail from the passage but don't answer the specific question being asked.

Winning move

Anticipate the answer in your own words from the passage, then find the choice that matches that prediction.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
6.

The author of passage B would be most likely to hold which one of the following views about the characterization of muscle memory offered in the

Answer choices

  1. Opposite1% picked this

    It confirms that bodybuilders' experiences should not be accepted at

    Passage B shouldn't be agreeing with the statement. And Passage B was never denying that muscle memory exists, or saying we should doubt the claims of bodybuilders that it does exist.

  2. Opposite: dichotomy16% picked this

    It reflects a dichotomy between athletes' experience and processes occurring at the cellular level

    This answer, like (A), is suggesting that Passage B thinks that even though athletes think muscle memory is real, it's not really real at the cellular level. A dichotomy means a striking difference, and the author wouldn't say there's a striking difference between thinking that your body has muscle memory and what's happening on the cellular level with your muscle cells. Passage B totally accepts that muscle memory is real and provides the emerging cellular explanation for the phenomenon.

  3. Bad Match1% picked this

    It would not be accepted by most athletes who have started retraining after a

    This answer is saying that most athletes who start re-training wouldn't agree that "muscle memory is a puzzling phenomenon". Rephrased, this answer is saying that most athletes who start re-training would say "muscle memory isn't a puzzling phenomenon". Most athletes embarking on re-training will probably say, "Muscle memory seems to exist; seems to be a real thing". But we don't know their opinion on whether or not it's a puzzling phenomenon, because that sentence isn't about whether or not muscle memory exists, it's about how to causally explain that it exists.

  4. Correct80% picked this

    It is less apt now in light of recent research than it was before that

    Why this is right

    As we predicted, passage B would disagree that muscle memory is still a puzzling phenomenon. Its very first sentence says "Pumping up is easier for people who have been buff before (i.e. muscle memory) and now scientists think they know why". That sentence reveals that's it's no longer apt to call it a puzzling phenomenon, but it also reflects that we only recently figured it out.

    Skill tested: Author Opinion · how this choice captures the passage's function is the move to repeat next time.

  5. Out of Scope: principles of exercise2% picked this

    It stems from a fundamental misunderstanding of the principles of

    The author of passage B never said anything like, "People only think muscle memory is a puzzling phenomenon because they don't understand principles of exercise psychology". Passage B isn't about psychology at all. It's about the physiological basis of muscle memory that we have recently discovered. Passage B would say, "It stems from a misunderstanding of what happens when muscles atrophy". Researchers had thought previously that the extra nuclei were killed during apoptosis, but a recent study in mice showed otherwise.

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