Muscle Growth
Laura Schneider
2026-03-25
8 min. read
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Strength training leads to the formation of microscopic damages in muscle fibers, which result in an increase in volume after the regeneration process. This is the mechanism that leads to muscle growth. However, some experts believe that once a muscle fiber reaches a certain size, it divides, resulting in an increase in the number of fibers, thereby opening up new possibilities for further muscle development. This process is known as muscle hyperplasia.
What is the phenomenon of increasing the number of muscle fibers?
The phenomenon of increasing the number of muscle fibers is not related to the qualitative growth of muscle fibers, but to their greater quantity. Normally, when we exercise, we do not increase the number of muscle cells, but we increase the amount of myofibrils and mitochondria that are contained in them. In short, in humans, when muscle mass increases, the number of muscle cells does not increase. The volume of muscles increases due to the so-called muscle hypertrophy, which we call the synthesis of muscle tissue, but only after reaching the state of myofibrils and mitochondria that are contained in them.
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