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This Danish Man Is a Master At Breaking Concrete Blocks With One Inch Punch!

A Danish Man John Kalmar Is a Master At Breaking Concrete Blocks With Only An Inch Of Clearance. Punch a brick with your bare hand, and if you are untutored in the martial arts, you may break a finger. Punch it with the proper force, momentum, and positioning, and you’ll break the brick instead.

image credit: John Kalmar

The one-inch punch is a punching exercise from Chinese martial arts (kung fu) performed at a range of 0–15 cm.The one-inch punch was popularised by actor and martial artist Bruce Lee. It is designed to improve punching power and technique.Amazingly, there are no tricks involved,What you have here is one of the most efficient human movements ever conceived.

image credit: John Kalmar

Reaching the equivalent limit in the body’s bones is no easy matter. Feld says bone can withstand 40 times as much force as concrete, and a cylinder of bone less than an inch in diameter and 21/3 inches long can withstand a force of 25,000 newtons.


Hands and feet can take even more abuse, because skin, muscles, ligaments, tendons, and cartilage absorb a great deal of impact. A well-kicked foot can absorb about 2,000 times as much force as concrete before breaking. Feld has never fractured a finger in karate, even though he once broke eight one-inch-thick boards at a time (discovermagazine)

Breaking is a martial arts technique that is used in competition, demonstration and testing. Breaking is an action where a martial artist uses a striking surface to break one or more objects using the skills honed in their art form. The striking surface is usually a hand or a foot, but may also be a fingertip, toe, head, elbow, knuckle, or knee. The most common object is a piece of wood or brick, though it is also common to break cinder blocks, glass, or even a piece of metal such as steel bars. Glass is usually discouraged, since its shards may cause injury when broken.