2. Stretch your back, lift your legs at a right angle of 90 degrees, lift your back, and try to touch your toes with your hands. The action lasts for 45 seconds. It is recommended to do 20-30 groups at a time.
3. Lift the span sideways, supported by legs and ipsilateral arms, and lift the span upward forcibly. The action lasts for 45 seconds, and it is recommended to do it 20-30 times each time.
4.? Abdominal wheel, legs bent into a triangle, and the upper body is at a 45-degree angle with the ground. Twist the abdominal muscles left and right. The action lasts for 45 seconds. It is recommended to do 50-60 groups at a time.