You will have to know what Chi (qi) is when performing Taoist excercises, from Tai Chi, chi kung to Taoist meditation.

Chi internal energy in our body. 

By practicing Taoist exercises, we learn to harness the chi, allowing it to circulate freely within our body and exercise our internal organs, from intestines to the liver and the lungs, making them healthier.   It also helps our mind to focus, become more alive and nimble, making us stronger inside out.

A simple way to feel the chi is to place your two palms against each other, before your lower abdomen.  Relax your palms, and you will feel a current moving between the palms.  This is the chi.

You can then play with it, as if an invisible ball, like what you see in the Taoisit Exercises video below.

Play With Chi of Tai Chi