Sitting and lying forward in the senior high school entrance examination, will it go backwards if you don't practice for more than a year? Knowing how to advance, you will get extra points.
Yes, it is the ligament that flexes in front of the sitting position. If you don't pull the ligament for a long time, you will go backwards. In fact, you don't need to spend a lot of time practicing every day. You just need to press it on the bed when you sleep, and you can maintain good ligament toughness. Although it is not guaranteed to be at the peak level, it is enough. Hope to adopt.