1. People lie on their backs

2. Hands and feet are upturned at the same time (depending on the strength of the abdomen)

3. If you do the standard repeatedly, I guarantee that you can't even do it the first time 10, and there is no ration every day. If you really can't, do it.

The answer is brief and to the point. I hope it can help you get rid of your confusion. If you have any fitness questions, you can ask our coach to answer them.