The principles of Taekwondo techniques are based on the design of your body. For power you develop the larger, powerful muscles of the torso. The speed of the techniques comes from the fast, agile muscles of the arms and legs. As you progress in Taekwondo, you will learn to coordinate this speed and power, and develop a concentration to focus all of your body’s strength into a small, hard striking surface like the edge of the hand or the heel of a foot.