How to train waist strength in traditional martial arts

You can train in pile work to strengthen the waist and limbs. Then you can train the body movement, (i.e. Dantian Gong), as a preparation for the power. In two months or so, there will be amazing results, this is the real martial arts secret! Available in the form of words is difficult to explain, have to teach by example will be reasonable! Otherwise, it is specious and hearsay.