Question 4 of 5 Marathon runners: A. can run only one or two marathons a year. B. only eat carbohydrates. C. tend to have more slow-twitch muscle fibers. D. are always very thin.

Question

Question 4 of 5 Marathon runners: A. can run only one or two marathons a year. B. only eat carbohydrates. C. tend to have more slow-twitch muscle fibers. D. are always very thin.

Answer 1

This question is about the characteristics of marathon runners. Let's analyze each option:A. Marathon runners can run only one or two marathons a year. This statement is not necessarily true. The number of marathons a runner can participate in depends on their training, recovery, and overall health, not just their status as a marathon runner.B. Marathon runners only eat carbohydrates. This is also not true. While carbohydrates are a crucial source of energy for marathon runners, they also need proteins and fats in their diet for overall health and muscle recovery.C. Marathon runners tend to have more slow-twitch muscle fibers. This is true. Slow-twitch muscle fibers are more efficient at using oxygen to generate energy for continuous, extended muscle contractions over a long time, which is beneficial for endurance activities like marathons.D. Marathon runners are always very thin. This is not necessarily true. The body composition of marathon runners can vary widely. Some may be lean, but others may have a more muscular build.Therefore, the correct answer is C, as it accurately describes a characteristic of marathon runners.

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Question 4 of 5 Marathon runners: A. can run only one or two marathons a year. B. only eat carbohydrates. C. tend to have more slow-twitch muscle fibers. D. are always very thin.

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