Several of the styles I have tried practice combinations that do not seem logical to me, and use principles that do not seem effective. For example, in Tae Kwon Do they teach you to perform an out to in block across your chest, (also found in karate) but then to counter punch you have to reverse direction to the opposite side of your body. To punch in that manner you must stop the force of the block reverse the force to punch. It seems to take a great deal of energy. They teach you stay so tense when you move as well, it gets tiring very quickly. I mean no disrespect to any art, I have seen several fine practitioners of each, but some of the principles do not make sense to me. What does everyone else think?