River bed movement
Lie on your back, keep your upper body still, cross your feet and press your abdomen. Lift your feet at right angles to your upper body, and then gently put them down. Do it repeatedly. Put your hands around your knees, put your thighs close to your stomach, and then recover. Do it repeatedly. Lift your feet up, just like riding a bicycle, and beat one, two, one, two, and turn your left and right feet back and forth.
Chair abdominal strenuous exercise.
Sit in a chair and slowly lift your legs. Put your hands gently on the lower abdomen, exhale slowly, and gradually tighten the lower abdomen while exhaling. Exhale slowly, the abdomen is getting tighter and tighter, and the shoulders are kept relaxed. When the abdomen is the tightest, the qi is also spit out. After the shoulders and lower abdomen are relaxed, slowly start inhaling. Inhale as much as possible. At this time, the lower abdomen does not need to be deliberately contracted, but the abdomen is pressed down.