Mermaid line is necessary to practice oblique abdominal muscles, and generally abdominal muscles are rarely practiced. Without partial weight loss, thin thighs should be aerobic and anaerobic. Eight-pack abdominal muscles can only be seen when body fat is low, so you should practice all over your body. The specific scheme is in the attachment, which is dumbbell and no equipment scheme, and there are some graphic and video tutorial materials.

Practice the action of abdominal oblique muscle:

Basically, it is 20-30 times in 3-8 groups, and the rest between groups is within 1 minute, which is appropriately increased or decreased.