With training, what changes will occur in the muscles of the lower limbs of a marathon runner?
A) Development of more extensive capillary networks; cells develop more mitochondria
B) Formation of more actin and myosin, causing enlargement of muscle fibers
C) Loss of myoglobin and reduction in size of muscle fibers
D) Drastic increase in number of muscle fibers

Question

Quizplus · Accepted Answer

Endurance training, like marathon running, leads to increased capillary networks and more mitochondria in muscle cells to improve oxygen delivery and energy production.

With Training, What Changes Will Occur in the Muscles of the Lower