(1) Sit in a chair, gently retract your chin, put your hands and fingers on the back of your head, pull your elbows back as far as possible, pause for 5 seconds, relax and repeat for 5 times.

(2) Sit in a chair, put your hands on your back, stretch your hands backwards and upwards, arch your back, pause for 5 seconds, relax and repeat for 5 times.

(3) Sit in a chair, bend forward until the palms of your hands are attached to the instep, pause for 5 seconds, relax and repeat for 5 times.

(4) Sit in a chair, lift your left foot to the height of the chair surface, hold your left ankle with both hands, pause for 5 seconds, relax, change to lift your right foot to the height of the chair surface, hold your right ankle with both hands, pause for 5 seconds, relax and repeat for 5 times.

(5) Stretch the waist, stand up, gently support the back with both hands, lean back until you feel the abdominal muscles, pause for 5 seconds, relax, and repeat for 5 times.

(6) Pull your shoulders, stand, cross your fingers, palms outward, straighten your arms forward and upward, pause for 5 seconds, relax and repeat for 5 times.