AG8球仰卧屈膝举腿转腰动作要领 —》我雷锋 我翻译
Set up for the exercise ball hip roll by placing a mat on the floor and placing the exercise ball at one end.
Lay down on your back on the mat and put your legs over the top of the exercise ball. Your calves should be on top of the ball.
For stability, put your arms out flat on the floor with your palms facing down. This is the starting position for the exercise.
Using your core muscles, roll the exercise ball over to the left as far as possible.
Repeat this movement for the right side.
This is one rep, repeat for desired reps.
The further you move the ball the harder you core has to work. Move the ball as far as possible for the best results.