Sit down in a sitting meditation posture with crossed legs, the eyes slightly closed, the chest relaxed, the tip of the tongue lightly touches the palate behind the front teeth and the fists rest relaxed on the knees (see illustration). Concentrate your attention on your Dantian (the elixir field) below your  belly button and breath smoothly in and out using the micro cosmic orbit. During the cosmic orbit we repeat the special MartriX mantra:

With Omm in your mind or softly pronouncing, you breath from your Dantian and direct the air  imaginary down and via your coccyx, sacrum  and your spine up till you reach the highest point of your crown. For this you use 1/3 of your complete breathing orbit. Then you breath slowly out with Mama Ni Hoem Solei to complete the final 2/3 of the breathing orbit till you are imaginary back in your Dantian.
This mantra and breathing orbit you repeat till you start a light trance or dream state. Beginners can start with natural breathing and then slowly start to breath deeper, but they also can practice deep breathing and abdominal breathing from the beginning.

This sitting WUJI meditation is effective for stopping self talk, it calms down the spirit, drives away confusion, relaxes the muscles and quiets the breathing. The meditation can be used as an independent or preparing exercise for the most diverge tasks.
The extended deep breathing  raises oxygen take in and carbon dioxide secretion by the lungs, and is very beneficial for improving the general vitality of the inner milieu.

Wuyiquan exercises are very good both to stay healthy as well as to treat complains and disorders, that is why thy are suitable for rehabilitation.