A powerful rush towards an opponent, and you can
uproot his stance. Then, he is in a odd physical
position and cannot apply any "techniques" he
has trained in. Most of the technique-based
arts from Indonesia/Philippines were made by
lightweight practitioners, who could work off
the geometry. In America, you may have to fight someone
who could be a big football player or a big wrestler
type and you do require power to fight such a
body type.