Refer to the figure showing the leg muscles of two athletes. Investigators studying the leg muscles of Usain Bolt, the Olympian recognized as the fastest sprinter in the world for his performance in the 100-meter dash, would likely find _______ muscle fibers, as shown in the panel on the _______.

Question

Refer to the figure showing the leg muscles of two athletes.  Investigators studying the leg muscles of Usain Bolt, the Olympian recognized as the fastest sprinter in the world for his performance in the 100-meter dash, would likely find _______ muscle fibers, as shown in the panel on the _______.

Quizplus · Accepted Answer

Usain Bolt is known for his explosive speed, which is primarily powered by fast-twitch muscle fibers. Therefore, investigators studying his leg muscles would likely find abundant fast-twitch muscle fibers, which are shown in the panel on the right. Slow-twitch muscle fibers are associated with endurance activities, such as long-distance running, and are not as important for sprinting.

Refer to the Figure Showing the Leg Muscles of Two