Diaphragm tightness related to chronic illness

As you have posted multiple times, I'm going to answer part of your question here and the rest in your other post.

I'm not certain what point your teacher is talking about, it's probably zhong ting (or CV 16) but you should probably ask him just to be certain. It follows the conception vessel meridian, which is the meridian that is followed to descend the energy from the head down to the dantian. Either way, the majority of problems that arise with qigong practice is forcing the issue through over controlled visualizations and/or over controlled breathing. Either of these is a near certain way to create more problems and ensure that the qigong is not as beneficial as it could be for your health and energy.

Qigong practice has to be done properly, slowly and in a non controlled way. Over time the energy will follow the prescribed paths. They will follow these paths not through force but because it is the natural path of the bodies energies.

You can not hurry the openings of the body through excessive practicing, over visualization, and improper breathing (which usually happens through focusing too hard, or just trying to follow a breathing/movement prescription without it being natural). 3 hours of practice a day seems a little excessive to me personally particularly if you have a chronic illness. I would, however, recommend a walk and some kind of proper closing exercises after the qi gong to release any stuck energy. The closing can be simply to rub the body down from head to toe.

Not to add any more to your plate. But we use a qigong routine called the "Da Peng Gong" which focuses more on opening the body physically with some spinal twists, neck stretches, etc. mixed with various energetic movements. Personally I think it is an excellent practice and useful to remove the physical blockages that lead to poor energy circulation. You can read more about that here -