The research progress of strength training has always attracted the attention of physical coaches in various countries and has become an important content of physical training. Since in competitive sports, almost all sports apply force to external objects (such as shot put, ground and water, etc.) Through the end of the limbs, causing the human body or equipment to move. Therefore, in the field of competitive sports training for a long time, people have been focusing on strength training on the limbs, ignoring or even abandoning muscle strength training in core parts such as the trunk.
