The third tip is to stretch your body and use your momentum fully. Before serve, you need to impart your weight on the rear foot and keep your forearm and wrist open. During the serve, you need to change your weight from the rear foot to the front foot. Meanwhile, move your forearm forwards naturally with your body movement. Watch out! With fully use of change of your weight location and twist of your wrist, you will make a much heavier spin serve.
The fourth tip is about how to maximize your power. There are some points. The first point is two as one. The body, such as your weight position, and the forearm, such as wrist, fingers, imparts the ball with forces towards the same direction at the same time. Neither moving body first nor moving forearm first can make the serve with heavy spins. The second point is you must maximize the power from your body. Many players serve without the power from the body. For example, XU Xin focused on maximizing body’s power when practicing serves with disguised backspin. He practiced for only twenty minutes and he took a sick-leave that afternoon because his hips hurt. His hips hurt because he did not use body’s power before. Once maximizing body’s power by LIU Guoliang, his hips hurt. Therefore, you must maximize your body’s power towards the serve. You see. Your body’s power must be way too lager than your forearm’s power, right? You must maximize your body’s power towards the serve. One more point is about your grip. How you grip your racket with your fingers is quite essential. If you make a side-spin serve, your middle finger must hold out against the racket tightly. By doing this, you can maximize your serve power. The forth point is to make your racket sink down and run wild. You need to feel a power running wild, injecting in to the rackets, and running out of the racket. By movement of your weight from the rear foot to the front foot, the power accumulates and passes through your foot, waist, forearm, wrist, fingers, the racket, and finally onto the ball imparting it maximized power.