(2) Sit up straight with your hands crossed on the headrest; Press the back of your head hard and lean back hard for 30 seconds.
(3) Sit up straight and hold your hands tightly behind the back of the chair 1 min.
(4) When the arm is bent, put it vertically on the table, put your chin on your palm, and take a deep breath for 20 times.
(5) Stand up along the edge of the table, turn your upper body 10 times, preferably with your back to the table, and then lift one end of the table forcibly.
(6) Stand in the door frame and push the door frame with both hands for 20 times.
(7) Sit at the table and hold the things on the table with both hands. 1 minute.