Satellite cells are a type of stem cell found in skeletal muscle tissue. They play a crucial role in muscle growth, repair, and regeneration. When muscle fibers are damaged, these cells become activated, proliferate, and can either fuse with existing muscle fibers to help repair them or form new muscle fibers. In addition to their role in muscle repair, satellite cells are important for muscle adaptation during exercise. They help increase muscle mass and strength by contributing to the formation of new muscle fibers in response to physical activity. This process is essential for maintaining muscle health throughout life.