About the effect! My experience is good for practicing martial arts. I have practiced martial arts for five years and been a coach for two years, and I have a deep understanding of this. It takes time to practice Yijinjing slowly, and the movements should be even. It takes at least 10 minutes to practice once. That's good. Every movement should be in place. After practicing for a period of time, you will find that in actual combat, your endurance is much better than before, your strength is greater, and your bones are hardened.
Another interesting phenomenon is that when you go swimming, you will find that your buoyancy is very small and it is easy to sink. This is because your bones and muscles are dense.
I sent you four versions, and I practiced the third one. It feels good. Practice whichever you like!