NeiJia refers to 'Internal Martial Arts'. NeiGong means 'Inside Development' and QiGong exercises are a kind of NeiGong. Anyone can practice NeiGong. Authentic methods energize the body while calming the mind.
Benefits include:
- Relaxation
- Flexible Core Power
- Increased Flexibility
- Increased Concentraion
- Increased Energy
- Better Immune Function
- Improved Digestion
The most important thing for a beginner to keep in mind about NeiGong is that the breath and movement are complimentary. Safe training using authentic methods follows a specific detailed process of progressive refinement. You will safely change if you train exactly as instructed.
Wikipedia Entry ( ed. note: very broad generalizations, but an ok place to start )
