Qigong is a movement of mind, breath and limbs. If you practice well, you will have a feeling called "Qi". Of course, because everyone's physique is different, there may not be a sense of "qi", but this does not affect the health-keeping function of Qigong. Common feelings include fever, swelling and numbness. There are also some static exercises, and you may hear the sound of internal organs in your stomach. In the words of the book, it is "thunder and thunder from time to time." That's about it.