2. Hold your fist correctly
When performing the one-inch punch, the wrist is held with the knuckles turned horizontally, and is then moved up when the strike is produced. As with any punch, you want to close your hand so that your fingers fold over your palm with thumb tucked around.
3. Put your whole body into it
As Jessica Rose, Stanford University's biomechanical researcher explains, the punch is less about the fist and more of a full-body movement. "When watching the one-inch punch, you can see that his leading and trailing legs straighten with a rapid, explosive knee extension."
The twist of Lee's hips lurches the shoulder of his thrusting arm forward, giving him momentum and power, ensuring the person on the receiving end of the punch gets—as the kids say—rekt.