2, through "swimming to reduce beer belly" or "hula hoop to reduce beer belly", it can be done at the same time;

3. The following is another "method" I found on other websites;

Complete each action according to the prescribed number of repetitions, and don't pause between two actions. After completing all five movements, rest for no more than 15 seconds and start again. You can always do it three times at the beginning and gradually increase it to five times.

1. Put your head in your hands, lift your feet upward, bend your knees at right angles, and straighten your right foot forward, but don't touch the ground. Lift your body and turn to the left so that your right elbow touches your left knee. Change your left foot and straighten it forward, then turn right. Repeat 10 times.

2. Put your head in your hands, bend your feet and step on the ground. Put your right heel on your left knee. Lift your left palm a few centimeters off the ground. Lift your body and feet so that your head touches your right knee. Hold this position for 2-3 seconds. Repeat, but do not touch the ground with your left foot. Put your left heel on your right knee and do it again. Repeat 10 second.

3. Put your hands on your sides and put your feet together. Lift your right foot, relax your knees, turn your hips to the left, and let your right foot lie on the floor across your body. The right foot recovered slowly. Lift your left foot and do it again. Repeat 10 times.

4. Put your hands on your sides, lift your feet, bend your knees at right angles, tighten your abdominal muscles, lift your hips, and let your knees touch your chest. Hold this position for 2-3 seconds before doing it. Repeat 20 times.

5. Put your hands on your head and elbows at your sides. Feet up, feet together, knees slightly bent. Raise your head and shoulders, but your back can't leave the ground to recover. Repeat 20 times.