Compared to those who have received formal training, those who practice extensively naturally develop smooth movements of racket and body simultaneously. Individuals in the social group may not have such extensive practice. Without understanding the principles behind coordinating hand and body movements, it may take a longer time or even be impossible to acquire these skills through natural practice alone. The purpose of this episode is to dissect this action, providing you with the opportunity to first understand it, thus enabling you to eventually execute it effectively.