Shark line, distributed in human ribs, is scientifically called "serratus anterior". It is called the shark line because it looks like the cheeks on both sides of a shark. It looks like a bullet clip hanging on your body, which is also commonly known as "bullet muscle".

The difference between mermaid line and shark line;

Mermaid line is also called mermaid line, and its formal scientific name is "external oblique muscle", which generally refers to two muscle lines on both sides of male abdomen, close to the upper part of pelvis, forming a V-shape.

Because this line is similar to the slightly contracted shape of the lower part of a fish, it is called a fishing line. Nowadays, many female friends will try to exercise the mermaid line in order to look good. If you want to practice a mermaid line, you must first practice your abdominal muscles.

Unlike the mermaid line, the mermaid line is located obliquely below the abdomen, while the shark line is located obliquely above the abdomen. Because this muscle line looks like the muscle line of shark wings, it is called shark line.

The shark line can be regarded as the most difficult muscle line in the abdomen. If 65,438+00% people can develop eight-pack abdominal muscles, then only 65,438+0% people can develop shark lines, so if you want to develop shark lines, you must make greater efforts.

Which is better to practice, abdominal muscle or shark muscle:

Abdominal muscles are easier to practice. Exercise abdominal muscles and do some abdominal core strength exercises, such as supine belly roll, supine leg lift, supine twist and so on. These movements are very simple. Shark muscles can be pulled down with one arm rope, and dumbbells can be lifted with one arm. These movements are much more difficult than abdominal muscles.