Chi is an Asian concept -- also referred to as qi, ki, or prana -- that references the electrical energy emitted from a living being. Chi exists in western culture through martial arts, reiki, qi gong, acupressure and other practices. Chi flows through the body via electrical pathways called meridians. Each meridian refers to separate bodily functions, systems and organs through numbered acupressure points. Chi blocking is a martial art neutralization technique that, with minimal effort, can weaken an opponent by applying the right amount of pressure to particular acupressure points.
Find an appropriate point on your opponent's body. As most fights begin with arm punching, points on the arm are a good place to start. Find the 10th point on the meridian referred to as the large intestine meridian. This point is found on the outside of the forearm, four fingers from the elbow, in the crevice between muscles. This point corresponds to the diaphragm, therefore affecting your opponent's breathing when you strike.
Keep your focus on weakening your opponent with your strike. This focused mindset is what helps make your strike successful, making it powerful with minimal effort. Remain calm and relaxed, allowing the stillness of your mind to engage in a more clear line of thinking.
Have your opponent come at you with arms bent at 90-degree angles. By using one or two knuckles at a 45-degree angle, penetrate through the surface of his or her arm at your chosen acupressure point. Using your knuckles creates a more precise striking mechanism. Striking this point with accuracy will probably render your opponent incapacitated or even unconscious, so use caution while practicing this move.