Im with Light on this, the front foot should not be flat on the floor theirs to much energy going through it,and not the fist The energy is going theough the floor not the fist.The energy source is the back foot,the front foot is the direction If the weight is on the front you cannot generate power of the back.Plus if you get countered in that position, youve got problems, and its harder to move.The hips wont generate the same power because the knee wont let it.Also the mechanics of the lower back dont work as they should, so the shoulders wont.sorry Greys