1, the first action is the stretching of the arm. When resting, you can stretch your arm, stretching it properly for 20 times, twice a day in the morning and evening, which is effective.

2. The second action is to lift the water bottle. After the water cup or water bottle is filled with water, hold it high and lift it up and down. This five to eight minutes is also very effective.

3. The third action is to use a water bottle or a heavy book, hold it with both hands and lift it upward, with arms straight, one reaching forward and the other reaching sideways. Take it back quickly and you can lose weight quickly.

The fourth action is to do one-leg push-ups in the classroom during lunch break, which can exercise the biceps brachii of the arm and help the arm to become thinner. The last action is to lift any leg, bend the arm, make the body close to the ground, and then change the leg before doing the previous action, which can also help students lose weight quickly.