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Spread Blocks. Spread blocks block and spread two attacks aimed at the same target. For example, if the attack is twin punches to the face or a two-hand throat grab, a spread block uses two arms to come up between the two arms block them and spread them apart so neither reaches its target.
X Blocks. X blocks are blocks where two limbs are crossed in a X shape that catches and stops the attack in the V of the open end. It will be almost impossible for an attack to break through the block. For example, if the attack is a middle section front kick, a low X block may be used to trap and stop the kick.
Jam Blocks. Jam blocks trap a chambered attack and prevent it from firing. Examples are pinning an arm to opponent's chest with a palm block, using a side kick to the shin to prevent a chambered front kick from firing, or closing the range so closely that the opponent cannot punch or kick.
Leg Blocks. The legs may be used to block kicks. A leg may be chambered into a position where it blocks a kick and then fires a counter kick. For example, a side kick chamber may be used to block a side kick, and then fire its own side kick; or a waving check kick may be used to block a kick to the groin.
Knee Blocks. The knees may be used to block kicks and sometimes punches. A knee may be pulled into a high front kick chamber to block a kick or punch to the lower abdomen, and then the leg may be used to fire a counter kick.
Foot Blocks. The feet may be used to block kicks and punches, even high section attacks. For example, a crescent kick, inside or outside, may be used to block a punch to the head. I once trained under a Korean master who would use a lead leg outside crescent kick to block a punch, and then use the toes of the foot to grab the opponent's lapel and then pull the opponent forward into a reverse punch.
Elbow Blocks. The point of an elbow may be used to block a kick. It is dangerous to use in that the narrow surface area of the elbow makes it easy to miss the leg entirely, but if the elbow makes contact it will probably cause serious injury to the leg.
Shoulder Blocks. A shoulder may be rotated toward the inside to block punches or kicks.
Hip Blocks. A hip may be rotated toward the inside to block kicks.
Target Substitution. Although not actually a block, a less desirable target may be substituted for a vital target to minimize damage. For example, if a kick is aimed at the lower ribs, the resulting impact could cause broken ribs. If the body is rotated so the impact point will be upon locked down lower abdominal muscles, where the impact will probably only cause bruising.