A room full of pendulum-type grandfather clocks with the pendulums in motion at different times, they will all swing differently. Within a day, all the pendulums will be swinging together at the same rate. This is entrainment. It was discovered by the Dutch scientist Christian Huygens in 1665.
Many corporate and religious bonding and conformance is reinforced with all kinds of group activity; that by itself has no particular changing influence.
When troops march together they are practicing compatibility of moves and timing one’s actions to another; for team responsiveness. This is the foundation of share timed lived experience; enables a group coordinated military action.
Entrainment is actually an aspect of resonance. Resonance may be defined as the frequency at which an object most naturally wants to vibrate. One object may set another object into motion if it shares the same resonant frequency. When you strike a tuning fork and bring it near another tuning fork of that same frequency, the second tuning fork will start vibrating; even though it has not been struck, the second fork will begin to vibrate and sound merely by being in the same field as the vibrating tuning fork. A tuning fork will cause a guitar string tuned to the same frequency to vibrate without contact.
A singer breaking a glass with his or her voice is an example of resonance. This also occurs between two guitar strings, one struck and one motionless. Resonance is a cooperative phenomenon between two objects that share the same frequency; where the natural vibrations of an object with its own vibrations set the other into motion. Thus resonance may be conceived of as being passive in nature.
Entrainment can change the natural oscillatory patterns, frequency or rhythm of one object and replace them with the different patterns of another (changing the vibrations of one object to another rate).
Internal blows will cause damage by the transmission of negative energy; that can pass through other areas, without damaging and/or moving them.
This is how Kuo Yu Chang (Gu Ruzhang) can break a brick in the middle of a stack, without harming the rest.
Some oscillatory patterns, frequency or rhythms build on each other, like successive waves cresting on top of each other. Many Rouge Wave Rollers over a hundred feet, are created in this manner. Nicola Tesla could destroy a small building with a small oscillatory motor he built, that would vibrate at the same frequency, and build on itself. Troops marching over a bridge deliberately set their march out of time, since it has destroyed bridges before.
Click here for entrainment in training
See: An Internal Iron Palm strike to a telephone pole, that is bowed by the force of the strike; see the entrainment in the stance.
More on internals and internal workouts in the book
Axe Hand; Hsing-i & Internal Strength Workout
(click on for more info)