Rib eversion can be improved by doing yoga. Causes of rib eversion: lack of contraction of the whole abdominal wall. Abdominal wall refers to transverse abdominal muscle, oblique abdominal muscle, oblique abdominal muscle and rectus abdominis. One end of the abdominal wall is connected to the bottom of the ribs, and the other end is connected to the front of the pelvis. If the abdominal wall lacks the strength of adduction, it will relax outward.