Strong Fitness Bodybuilding Girl With Abdominal Six-pack Belly Muscles

Six pack
Six pack refer to a colloquial term for a well-defined rectus abdominis muscle of the human abdomen. The rectus abdominis muscle is a paired muscle running vertically on each side of the anterior wall of the human abdomen (and in some other animals). There are two parallel muscles, separated by a midline band of connective tissue called the linea alba (white line). It extends from the pubic symphysis/pubic crest inferiorly to the xiphisternum/xiphoid process and lower costal cartilages (5–7) superiorly.