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Sarcoplasmic hypertrophy refers to an increase in the volume of the sarcoplasmic fluid in the muscle cells, which contains myofibrils, organelles, and various other noncontractile components. This type of hypertrophy is aimed at increasing the muscle's overall endurance and its ability to store energy, rather than increasing the strength of the muscle itself.

The focus of sarcoplasmic hypertrophy includes a rise in the size of noncontractile structures such as glycogen levels, which are crucial for energy production during extended physical activities. This contrasts with myofibrillar hypertrophy, where the focus is primarily on an increase in myofibrils and contractile proteins, leading to increased muscle size and strength.

Thus, understanding the components of sarcoplasmic hypertrophy emphasizes the role of noncontractile structures in enhancing the muscle's endurance capabilities and energy storage, aligning with the physiological adaptations associated with higher repetition training typically used to achieve this form of hypertrophy.