When a person is lifting heavy weights, the fast-twitch muscle fibers contract quickly to produce force.
What are fast-twitch muscle fibers?
These are the muscle fibers, which provide more powerful and bigger forces, however, for short time duration and get fatigue quickly. They are anaerobic and possess less supply of blood. They are also considered as white fibers or type II. These muscle fibers are used at the time of sprinting, weight lifting, agility training, and jumping and strength training.
These muscle fibers possess lesser concentrations of myoglobin, mitochondria, and capillaries, and thus, they get fatigue quickly. These are large sized fibers and generate quicker and greater force, which plays essential role in power activities.
Thus, the correct statement is option A.
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