Hypertrophy refers to the process of muscle growth that occurs in response to resistance training. When muscles undergo stress from weightlifting, small tears develop in muscle fibers. The body repairs these fibers, leading to an increase in their size and strength as a part of muscle adaptation. Factors influencing hypertrophy include the type of training, nutrition (particularly protein intake), and recovery. Consistent resistance training focusing on progressive overload is essential for maximizing hypertrophic changes and enhancing overall muscle mass.