I am choreographing a traditional chinese sword dance, and purchased some tai chi swords that weigh about 2 pounds each. After working with them a bit, I noticed that my wrists were getting very sore, and that the the blade is extremely heavy. Also, the thickness of the blade also makes it difficult to turn/rotate the sword quickly. Is this how a tai chi sword is supposed to be?? Do I just need more practice before my arm gets used to it? I have seen videos where the tai chi swords used seem very flexible, or is this just a trick of the light?