I do not know if anyone has said anything similar, I don't feel like reading the 50 some replies. However, in my dojo great importance is put onto our kiai. Though they have never truly given a reason why we must do push ups if it is weak, I believe I understand why. The kiai being a battle cry it is much like the lion yoga move: a release of energy and even stress. Put everything that you have got into you kiai, if you are more worried about how others look at you, then either karate is not your thing, or you still have much to work on.
