The second type: sit in a chair, put your hands on your back, stretch your hands back and arch your back, pause for 5 seconds, relax and repeat for 5 times.
The third type: sit in a chair, bend forward until the palm is attached to the instep, pause for 5 seconds, relax and repeat for 5 times.
The fourth type: sitting in a chair, lifting your left foot to the height of the chair surface, holding your left ankle with both hands, pausing for 5 seconds, relaxing, replacing it with lifting your right foot to the height of the chair surface, holding your right ankle with both hands, pausing for 5 seconds, relaxing and repeating for 5 times.
Type 5: Stretch your waist: Stand up, gently support your back with your hands, lean back until you feel your abdominal muscles, pause for 5 seconds, relax and repeat for 5 times.
The sixth type: pull the shoulder: stand up, cross your hands and fingers, push your palms outward, straighten your arms forward and upward, pause for 5 seconds, relax and repeat for 5 times.