The vest line is a belly without fat, but it also has muscle lines. The abdomen is mainly composed of two parts, namely the abdominal muscle and the external oblique muscle, and lines will be formed between the abdominal muscle and the external oblique muscle. This is the vest line. Mermaid line, also known as mermaid line, is officially called "external oblique muscle", which is two lines on both sides of male abdomen near the upper pelvis, forming a V-shape. Because it is similar to the slightly contracted shape of the lower part of a fish, it is called a fishing line.

Method of practicing vest line

Sit and turn left and right: the hips sit on the cushion, and the upper body and lower body leave the cushion respectively, almost at a 90-degree angle. Legs can be crossed and bent. Keep this position. Hold hands and turn left and right respectively. You can do 50 at a time

Flat support method: put your elbows at 90 degrees to the ground under your shoulders, straighten your feet and step on the ground, keep your body in a straight line, tuck in your abdomen, and hold your hips in a left-right posture. 1 time for 30 seconds.