在跆拳道的练习当中要求在气势上给人以威严的感觉，练习者常以洪亮并带有威慑力的声音来显示自己的威力。据日本有关研究资料证明人在无负荷工作时百分之十的肌肉会由于发声使他们的收缩速度提高百分之九，在有负荷工作时更是可以提高百分之十四。这就是为什么在比赛当中，运动员会发出响亮的喊叫声的原因。在发声的同时停止呼吸，可以使人体内部的阻力减小；提高动作速度，集中精力使动作发挥出更大的威力。
In the practice of Taekwondo, it is required to give people a sense of dignity in momentum. Practitioners often show their power with loud and deterrent voice. According to relevant research data in Japan, it has been proved that 10% of muscles in people working without load will increase their contraction speed by 9% because of vocalization, and 14% when working with load. That's why athletes make loud shouts during competitions. Stopping breathing while making sound can reduce the resistance inside the human body, improve the movement speed and concentrate on making the movement play a greater power.