Question

why do people who participate in marathons tend to have smaller muscles?
a. lifting weights provides no benefits for them.
b. muscle endurance is more important for them than muscle strength.
c. continuous running burns glucose and fat.
d. they participate in a sport more suited to their body type.
please select the best answer from the choices provided.
a
b
c
d

Explanation:

Marathon runners focus on long - distance running. Muscle endurance (the ability of muscles to perform repeated contractions over an extended period) is crucial for them. Building large muscles (which is more related to strength training like weight - lifting) would add extra weight and be a disadvantage for long - distance running. While continuous running does burn glucose and fat (option C), it doesn't directly explain the smaller muscle size as much as the priority of endurance over strength. Option A is incorrect as weight - lifting can have some benefits (e.g., for core strength which can aid running form). Option D is too vague as it doesn't address the physiological reason related to muscle characteristics.

Answer:

B. Muscle endurance is more important for them than muscle strength.