What occurs when muscle fibers enlarge making the entire muscle larger or stronger?

When muscle fibers enlarge, a process known as hypertrophy occurs, resulting in an increase in the overall size and strength of the muscle. This growth typically happens in response to resistance training or Weightlifting, which creates micro-tears in the muscle fibers. The body repairs these tears by fusing the fibers, leading to thicker and stronger muscle fibers. Additionally, hormonal changes and increased protein synthesis contribute to this muscle growth process.