Muscle stem cells, also known as satellite cells, are specialized cells found in skeletal muscle tissue. They play a crucial role in muscle growth, repair, and regeneration. When muscle fibers are damaged, these stem cells become activated, proliferate, and differentiate into new muscle cells to help restore muscle function. In addition to their role in repair, muscle stem cells are important for muscle development during growth and exercise. They can also contribute to muscle hypertrophy, which is the increase in muscle size due to strength training. Understanding these cells is essential for advancing treatments for muscle-related diseases and injuries.