Is a girl's abdominal muscle called mermaid line or vest line

The obvious lines of female abdominal muscles are usually referred to as the vest line, while the mermaid line is often used to describe the muscle lines on both sides of the male lower abdomen. The vest line is a longitudinal groove formed by the rectus abdominis and external oblique muscles when body fat percentage is low, while the mermaid line is a V-shaped contour at the junction of the internal oblique muscle and the iliac crest. The formation mechanisms of the two are similar but located differently, with the main difference being the differences in fat distribution and muscle morphology caused by gender. The vest line is more common in the central abdomen of women and needs to be achieved by reducing body fat percentage and strengthening the core muscle group. Female body fat percentage usually needs to be controlled within a lower range, combined with targeted training such as abdominal rolling and flat support, to make the rectus abdominis muscle fibers visible. In terms of diet, it is necessary to ensure high-quality protein intake, avoid high sugar and high-fat foods, and engage in aerobic exercise to accelerate fat metabolism. Due to genetic factors or differences in pelvic structure, some women may be more prone to forming distinct vest lines. The mermaid line is more prominent in males, located at the junction of the lower abdomen and groin. Men have higher levels of testosterone and thicker muscle fibers, which can be strengthened by movements such as leg lifting and side rolling. Due to the tendency of male fat to accumulate in the waist and abdomen, it is necessary to reduce subcutaneous fat through high-intensity interval training and dietary control. A small number of women may also exhibit similar lines through long-term specialized training, but they are usually less affected by estrogen than men. Whether pursuing a vest line or a mermaid line, it is important to pay attention to the principles of scientific weight loss and gradual training. Women should avoid excessive pursuit of low body fat, which can lead to endocrine disorders. It is recommended to undergo core training at least three times a week, engage in aerobic exercise twice a week, and adopt a low-carbon, high protein diet. In the early stages of training, data can be monitored through a body fat scale, and local shaping can be strengthened once the body fat percentage enters the healthy range. If you experience abdominal pain or menstrual disorders, you should adjust your exercise intensity in a timely manner and consult a professional fitness coach or physician.