First, relax your arm, and then imagine your arm holding a racket as a whip or rope.
The whip is held on the shoulder and the tail of the whip is the head. When you hit the ball, you will feel that your hand is a whip.
The whip-swinging hand must have the characteristics of a whip, that is, it is soft, so it must be relaxed and never use force.
Where is that power? The whip handle is on the shoulder, so you can feel how to whip.
So be sure to adjust your breathing, try not to hold your breath, and do it with great effort. We should be uniform, which is very beneficial to his cardiovascular activities. Holding your breath for a long time is not good for middle-aged and elderly people. This is the same.
The second is to balance the left and right sides, not just the right side, nor the left side, so that the balance between the left and right sides of the body can be developed and exercised. The last one is to be gradual, from easy to difficult, from light to heavy, from short whip to long whip, from low voice to crisp sound.