Which of the following is most likely a difference between the leg muscles of an Olympic sprinter and the leg muscles of an Olympic marathon runner?
A) per gram, the sprinter's muscles would have more mitochondria than the marathon runner's muscles
B) per gram, the marathon runner's muscles would contain more myoglobin than the sprinter's muscles
C) the marathon runner's muscles would have a faster rate of contraction than the sprinter's muscles
D) per gram, the sprinter's muscles would use more oxygen than the marathon runner's muscles

Question

Quizplus · Accepted Answer

Marathon runners typically have a higher concentration of myoglobin in their muscles compared to sprinters. Myoglobin facilitates oxygen storage in muscle cells, which supports the endurance required for long-distance running. Sprinters, on the other hand, rely more on fast-twitch muscle fibers that are less dependent on oxygen, focusing on short bursts of speed.

Which of the Following Is Most Likely a Difference Between