White leggings underneath strangled deep cleavage name

Rectus abdominis. White tights underneath the name of the deep groove is the rectus abdominis muscle. The rectus abdominis muscle is located in the anterior abdominal wall on both sides of the midline, living in the rectus abdominis muscle sheath, for the upper wide narrow muscular narrow band, from the pubic symphysis and pubic symphysis between the pubic symphysis, muscle fibers upward to stop in front of the sternal raphe and the 5th -7th costal cartilage.