Spoken like a truly ignorant person!
Any elite athlete understands how to use their energy efficiently absent qigong training! I have been an elite athlete, something most martial artists, haven't been!
It is part of any expertise in any activity. I refer you to Chuang Tzu's Butcher!
Do you think an Olympic Diver, a Football Lineman, and Ballet Dancer, an Opera Singer, an elite Potter, a Mixed Martial Artist does not understand efficiency of movement?
Save your ignorant comments for your peanut gallery!