View Full Version : Boxing punch

5/11/2004 7:19am,
Some stuff...

Punch Force

Click on this link for a large report on Boxing,


about half way down is this concerning boxing punch power.

"...One kinematic analysis of the mechanical properties of a boxing punch from a professional heavyweight estimated a peak force on impact of 0.4 ton delivered at a velocity of 8.9 meters/sec, which represents a blow to the head approaching 0.63 ton. The latter is equivalent to swinging a padded wooden mallet with a mass of 6 kg at 20 miles per hour.22 Force is transmitted to the skull (causing transient deformation), which can cause contact trauma or focal contusions in the cerebral hemispheres beneath the point of cranial impact. Observational and cross-sectional studies have found that serum concentrations of enzymatic markers of central nervous system neurons and astrocytes are significantly elevated in boxers immediately after completing bouts, perhaps signaling acute damage to these cell types and disruption of the blood brain barrier.23,24"

5/11/2004 7:20am,

Compete Against The Computer.(computerized boxing bag)(Brief Article)

Current Science, Sept 22, 2000, by Rene S. Ebersole
U.S. flyweight boxer Jose Navarro, 18, packs a powerful punch in his 112-pound body. And he knows just how powerful because, while training for the Sydney Olympics, he hit a computerized boxing bag that measures the force, or push, of his punch.
On the outside, the bag looks like any ordinary punching bag. But encased in the bag are two accelerometers--instruments that measure acceleration. Acceleration is the change in a moving object's velocity (speed).
The whole principle of the bag owes a debt to Isaac Newton, the English physicist and mathematician. One of Newton's claims to fame is his Second Law of Motion. This law holds that force is equal to mass multiplied by acceleration. Multiplying the bag's mass, or weight, by the acceleration of the punched bag yields the force of a boxer's punch.
Wires from the heavy bag and a video camera plug into a computer, allowing coaches to watch real-time videos of boxers punching the bag side by side with a graph that shows the force of their punches. One important piece of information coaches can read from the screen is the impulse of each punch. That's arrived at by multiplying the force of the punch by the length of time it's in contact with the bag. The most powerful blows have a high impulse rating.
At 165 pounds, Jeff Lacey is the hardest hitter on the U.S. boxing team. Lacey's opponents get hit with the force of a 1,067-pound impulse! That's like running into a brick wall!
U.S. boxing coach Tom Mustin can't help but be surprised every time his team goes up against the bag. Before this technology came along, he said, coaches could only guess at an athlete's power. "Now, the computer heavy bag lets you make [positioning] adjustments to increase power."
Jose Navarro agrees. "The coaches go over what you're doing wrong, and that helps a lot," he said. "If I correct my mistakes, I'll be more effective."

5/11/2004 1:38pm,
Does it say what kind of punch was used?

5/11/2004 2:39pm,
Nope, that was the complete article.
Probably a hook or straight right (left).