Action 1: Push-ups. Be careful not to use inertia. Exhale when exerting force. Girls can do push-ups in kneeling position when doing it. Boys feel that the intensity is too low and can clap their hands and push-ups. Action 2: Jump and squat. Note that leg muscles can't relax their weight during jumping. Don't press your knees at will. There should be a controlled downward muscle strength upward. Action 3: Draw backwards. This action can be done with two stools and a straight pole. Girls can put the straight bar high, which is very helpful to shape the back line. For the last left-right jump, beginners must adjust the height of the stool to avoid tripping. You should have a sense of rhythm when you jump. When you feel like taking a break, stop in time to avoid injury.