The types of meditation connected with Chi, Yoga, Buhdism, Marshall Arts and others, are all Cult religion based. They are forms of meditation or praise and worship of a false god.
When I learned Marshall Arts, I would only learn the physical training part, not include myself in the mental meditative parts. Besides, I found with the higher thresh hold I had for pain, I could handle more than many of those doing that practice.
But.. point is, they are for praise and worship forms to false gods. Stay away from them at all costs, or as mentioned, it opens the door for direct demonic activity to start.
They are all for putting yourself in a state of mind, seperating yourself from the physical world to some level as well.
God Bless!!