The principle of muscle volume increase is the process of muscle repair after tearing, just like you cut a wire and want to reconnect it, you have to wrap the tape, and the position where the tape is wrapped will become thicker and stronger. This process is a bit like scarring after injury, and the scar will protrude. So are the muscles. This time, because it can't bear the weight, it will repair and grow to adapt to the next heavy test. Muscle fiber breakage is a necessary experience for muscle growth, so how long can it last without tearing? The language organization is not very good, so make do with it.