2. Action 2: Swing your legs alternately. Support your hips with your hands, stabilize your upper body with your arms slightly and swing your legs alternately. This action is mainly to exercise the abdominal muscles of the lower body. Number of action groups: 3-5 groups, 20-30 times for each foot in each group, and 2-5 minutes rest between groups.
3. Action 3: Russian twist. This action can effectively exercise abdominal muscles (such as mermaid line) and make your overall abdominal muscles more three-dimensional coordination. Number of action groups: 3-5 groups, 20-30 times in each group, with 2-4 minutes rest between groups.