However, speed is ineffective without proper control. Concentration and relaxation of power. The karateka cannot generate maximum power if his punches rely on the arm's muscles alone, or his kicks on the leg's muscles alone. The greatest level of power comes from concentrating all of the karateka's strength, from every part of the body, on the target. In addition, the karateka must generate power efficiently, using power when and where it is needed.
Maximum power is required only at the point of impact.
Until then, the karateka should stay relaxed and avoid generating unnecessary power. By tensing the wrong parts of the body or tensing at the wrong time, the karateka only diminishes the amount of power that goes into his block or attack. While he is relaxed, the karateka should stay mentally alert. Strengthening muscle power. The karateka must not only understand the principles of kihon, he must give them effect with strong, elastic muscles.