First, lie on your back on the floor, with your back close to the floor, hands on your head, then open your arms, then lift your legs and start pedaling your bike in the air at a slower speed. Exhale while doing it, and at the same time, lift your upper body, let your right elbow touch your left knee, hold it for 2 seconds, then restore it, and then touch your left elbow with your right knee for 2 seconds. Repeat 100-200. Mainly rely on the strength of the abdomen to complete the action, so the effect of thin abdomen is better.

2. Steering movement

The main turning movements are upright turning and sitting turning. When turning upright, prepare a clothesline or other long pole, keep your body upright, and separate your feet slightly wider than your shoulders. Then put the clothesline behind your shoulders with both hands and twist your upper body left and right. When doing this, use the strength of your waist and don't move your lower body. Sit on the floor with your fingers crossed, palms outward, arms straight forward, upper body twisted left and right, and pay attention to the use of waist strength.