pivot says that the Yellow emperor asks why that vital energy is declines?岐伯對曰人生十歲五藏始定血氣始通眞氣在下故好走기백 ... years old, the blood and energy is vigor, the flesh is growing up, so he likes running fast.三十歲五藏大定肌肉堅 ... ten years old, thefive organs is stable, the blood and energy is circulating, the real energy