Aikido is performed by blending with the way the attacker moves, using the force of the attack rather than coming against it. This is achieved by using the attackers "ki" against them. This takes very little physical strength, as the "aikidōka" (person who does aikido) uses the force of the attacker's own momentum using stepping and turning movements. The techniques are completed with many different throws or joint locks which can be combined with different defenses. Aikido is one of many grappling arts.