Scientific explanation for Bruce's legendary 1-inch punch

Bruce did the best technique. The right to make a wooden board break in a distance of 1 inch made the whole world admire.

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Bruce Lee (November 27, 1940 - July 20, 1973) is a martial arts legend, a world famous actor. He was the most successful performer of the "Best right" punch with an attack range of only 1 inch (equivalent to 2.54 cm) and still dealt great damage.

How did Bruce make the legendary punch?

Associate Professor of Orthopedic Surgery Jessica Rose at Stanford University has spent a lot of time researching Bruce Lee's famous "1-inch punch". According to her, this punch was made thanks to a special neural structure, not just normal muscle strength.

Bruce made this punch thanks to the ability to coordinate a series of complex movements throughout the body and the exact time of action.

When making a 1-inch punch, Bruce's legs and hind legs stretched out in an extremely fast way thanks to his knee, and his hips also rotated at high speed, his right shoulder (punched) jerked. forward. His hand was pulled back immediately after the piece of wood was punched. The shorter the duration of the punch force is, the more force is contained and the stronger the punch.

In just a few seconds, the largest muscle groups throughout Bruce Lee's body combined to create a legendary punch. Every joint and muscle are accelerating in just a moment, all the parts involved in the movement must reach a peak almost at the same time.

In 2012, Ed Roberts, a neuroscientist at Imperial College London, conducted a study to compare the strength of punches within 2 inches between karate masters and those with similar muscle mass. but not practicing martial arts.

After sweeping the brain activity of volunteers, Roberts discovered the link between strength and coordination in the martial world with the microstructure of white matter in the brains of martial arts practitioners when they performed the attack. similar to Bruce Lee's punch. Specifically, the brain region responsible for coordinating movement between muscles and the white matter content of the boxers allows them to perform very complex connections, thereby enhancing the ability to synchronize when performing the martial position. .

From a neurological perspective, the development of white matter in the brain is due to the flexibility of nerve cells (neuroplasticity - a brain ability to re-link to match new requirements). The more martial arts practitioners practice the martial arts requires the use of the body, the more white matter is added to the motor lobes to meet the requirements of the muscles.

According to Robert's research, Bruce Lee's white matter development is higher than normal, which is the result of his hard work and continuous training throughout his life.

How much energy does 1 inch punch transmit?

Authors of Fighting Science: The Laws of Physics for Martial Artists relied on Bruce Lee's performances to calculate the amount of kinetic energy the punch had infused participants in performances.

First, they formulated the formula for sliding friction force when the chair started to move, with default conditions such as the weight of the chair was negligible, the mass of the bearer was about 60kg and the coefficient of sliding friction between chair with floor is 0.5. Since then, they have introduced the formula for calculating friction force:

Sliding friction force = Perpendicular force between two objects (here is the seat + person compared to the floor) x Friction coefficient = Weight x Gravity acceleration x Coefficient of friction = 60 x 9.8 x 0, 5 = 294 Newton

According to estimates, the chair slipped about 1 meter, so the kinetic energy needed for the chair to slide with that distance or is the total amount of energy that the punch has been transmitted to the bearer is calculated by the formula.

Kinetic energy = Impact force (here is sliding friction force) x Moving distance = 294 x 1 = 294 Jun

So, the kinetic energy that Bruce's 1-inch punch emits is 294 Jun, while the kinetic energy of the 9x19 mm Parabellum bullet when leaving the barrel is about 458 Jun. Since then, we can see the danger level of Bruce's 1-inch punch and explain why it can break the piece of wood in a split second.