This is normal. The landlord has such a situation because Yijinjing consumes a lot of physical strength and has a strong action intensity, which is easy to make people tired. My personal opinion is to practice first, and the difficult ones must be slowed down first. For example, only practice 1-3 potential first, until the latter is basically effortless. In addition, the landlord may have problems with his work and rest, and his physical condition can be seen by Chinese medicine to help him regulate his "qi and blood".