entrainment

entrainment is the phenomenon of resonance... when you have 2 (or more) cycles that line up.   it's one of my favorite things.  it happens all the time, everywhere.  some examples:

• when you synchronize your body with music through dance
• when musicians play music together
  
• when that rattling sound in your car gets louder in a certain RPM range of your engine (some little part somewhere is resonant with the engine vibrations)
  
• as the moon pulls large masses of water around the earth, causing tides
• when someone pushes you on a swingset at just the right time intervals, making you go higher and higher
• when you tune a guitar string to another sound or string
• when a DJ mixes 2 songs together by matching their tempos (beat matching)
  
• when you catch a wave by paddling into it while surfing

the list is endless.

what does this have to do with chinese medicine?  many ways...  one of the fundamental principles of this practice of medicine is the alignment of the human body with various natural cycles, both internal and external.  illness can stem from misalignment.  we seek to reunite via resonance.