Jamming

Jamming is stopping an attack either by getting so close to the attacker that he or she does not have enough space to fire the attack (or not enough room to generate full power in the attack) or by using a body part to stop forward movement of the attacking limb. It takes less effort to prevent an attack from moving than it takes to stop the attack once it is moving. In addition, jamming frustrates the opponent because he or she never gets to fire the attack.

Foot Jamming

Foot jamming is when you place your foot on the floor in a position that prevents the opponent's foot or leg from moving. Even under tournament rules that do not permit kicks to an opponent's legs, these movements may be made subtly so they do not appear purposeful and thus will not draw a warning from the referee.

If you are within hand attack range, you are probably within range to jam a foot. When you are in close range, slugging it out with an opponent, punches and blocks flying, there is little time to think, however, a well-placed foot can distract or unbalance the opponent, creating an opportunity for you to apply the finishing blow.

If you are in a low stance, your lead foot will be close to the opponents lead foot, or you could purposefully let the lead foot creep forward until it is close to the opponents lead foot, or you could just step your foot into position. Either way, once you foot is in position, it may be used to prevent or impede movement of the opponent's foot.