Spetsnaz are also known for board and brick breaking, but not all styles of martial arts place equal emphasis on it or use it.
In a demonstration, a martial artist exhibits his or her skill by executing an impromptu or choreographed sequence of breaks for an audience.
Martial arts schools sometimes demonstrate challenging breaks in order to gain publicity and inspire enrollment or attendance.
In the past, Shaolin and other earlier martial artists would use many different types of devices in order to condition themselves, not always for simply breaking, but using the same concepts used today.
Many Chinese systems also are of the school of thought that "internal energy" or Chi is used when breaking, which is not dependent upon muscle strength and body weight.
There are generally three areas a martial arts breaker wishes to force their body to adapt to: the bones, the skin (calluses), and muscles (for both mass and speed).
The general principle here — for instance, for the bones — is found in Wolff's law, which states that the skeletal system will, after healing, be stronger if injury is put to it.
In this manner the breaking practitioner operates not unlike a bodybuilder who works out with weights, then takes a period of rest to heal and allow the muscles to come back stronger.
[3] USBA/WBA Founder Drew Serrano, producer of the documentary "Breaking All Records",[4] encourages practitioners to gradually increase the difficulty and amount of a material to avoid injury.
[3][4] There are safety concerns with martial arts breaking, so experts encourage learners to seek out an instructor.
It is very common for black belt tests to use bricks, concrete patio blocks, or several boards stacked on top of supporting objects for challenging downward strikes.
The breaker raises their hand and lets it fall with no tension or significant flexing of the muscles, instead relying mostly on gravity, in order to palm strike the material.
The impact also passes through a wider, more dispersed area and from a martial art perspective therefore causes more damage than other strikes, if delivered to a human adversary.
This results in an extremely brief contact with the face of the brick or board and the wave itself causes the striking surface to flex and buckle.