The sore hands prove that you are used to catching the ball with your arms, so that your arm muscles can bear all the transmitted forces, so that if you push too hard, you can easily be caught out of bounds, and the landing point is difficult to control. Incorrect posture may cause some muscle discomfort, which may lead to symmetrical stress on the hand. But the most important thing is that you play with your hands instead of your body! Tennis is a whole-body sport, which relies on the strength of the waist and the coordination of footsteps to achieve the best self-level. The arm is only an auxiliary weapon, not the essence of tennis. Make more use of waist strength to turn around and play ball. The correct posture helps to use the sense of ball! Come on ~