The increase in muscle mass that typically occurs with weight training is most likely caused by an increase in the number of which of the following?
A)Capillaries
B)Mitochondria
C)Muscle fibers
D)Myofibrils

Question

Quizplus · Accepted Answer

The increase in muscle mass from weight training is primarily due to hypertrophy, which involves an increase in the size and number of myofibrils within muscle fibers, not an increase in the number of muscle fibers themselves. This process enhances the muscle's ability to generate force.

The Increase in Muscle Mass That Typically Occurs with Weight