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12 minutes a day will give you a perfect woman's curved figure, bulging and curling back. The most brilliant point is wherever you go. As long as you persist for 12 minutes every day, learn with the following video:
The key to fitness and shaping is persistent. Although fitness is hard, if you persist, you will definitely get the results you expect.
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Extended reading:
Elastic band twisting - Elastic band twisting exercise side abdominal movements and movement tips
The all-round comparison between sit-ups and supine curls, who is better and worse
When sitting ups, you should roll up your upper body instead of lifting up!!!