1. Stand with your hands straight forward and your feet shoulder width apart.

2. Draw a circle with both hands and draw a circle outward for 20 times. 3. Draw a circle inward 20 times.

4. Don't draw too big a circle, use the strength of your arm, not your palm.

The second kind of thin arm movement:

1. Stand up straight, spread your feet about shoulder width, spread your arms to both sides, and slowly turn forward. The point is to tighten the muscles on the upper arm.

2. Stand up straight, spread your feet about shoulder width, spread your arms to both sides, and turn around slowly. This is mainly to tighten the muscles of the arms and chest.