While in the first phases of our Qigong development we find ourselves in a relaxing mood nurtured by our first years of dedicated practice, in the more advanced levels we feel pushed by our practice to make space for this new creature and modify our life style. Then, we go forward to act directly on the energy realm, the practice will be no more relaxing, but stressing instead, and the level of pressure that you will exercise on your system will be very high. This is not something that you can do aside with an already stressing and demanding routine. Advanced Qigong is sometime referred to as Nei Gong, ore internal work.