Dr. Yang briefly mentions bao ding balls as a means of stimulating qi in his book, Qigong for Health and Martial Arts. Since reading that I've picked up a set and started using them after training sessions, and any time I feel stressed (since they're good for that too). My question is, where should one's mind be for optimum benefit during practice?
In the beginning I was focusing on my lower tan tien like I do most of the day and/or trying to be relaxed and generally aware of my whole body all at once; almost as if I was using my whole body for the exercise. Lately I've been focusing solely on my hands (and feet, because I use them for foot massage too), placing my mind fully in the action of my fingers.
I haven't really felt any difference between the two methods, but my sensitivity to such things is still developing.