The vest line refers to the abdomen 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.

Mermaid line, also known as mermaid line, is officially called "external oblique muscle", which refers to the two lines that form a V shape on both sides of male abdomen near the upper pelvis, because it is similar to the slightly contracted shape of the lower part of fish.

Extended data:

First, exercise skills.

1, vest line

Stretch the abdomen hard to strengthen the muscle group; Hold your head up and chest up, and let your hands cross your knees; Bend your knees in a sit-up, leave your feet off the ground, and let your right hand shaft gently touch your left knee. Do it again. In this process, not only the upper body makes a rotation change, but also the knees touch the hand shaft in turn.

2. Mermaid line

After lying flat, hold the fixing frame with both hands, bend your knees 90 degrees, roll up your lower body with the strength of your lower abdomen, let your hips leave the mat, keep your knees in a fixed posture, and slowly resume the preparatory action. This action is repeated 15 to 20 times.

Second, the aerobic exercise that most people can choose is long-distance running and jogging to lose weight, spinning to lose weight, weight loss exercise to lose weight and so on. If the knee is often uncomfortable, you can use swimming and elliptical machine to lose weight.

Baidu encyclopedia-vest line

Baidu encyclopedia-mermaid line