This serpentine motion synchronizes:
Renal Adrenal Activation: Spinal undulation stimulates BL-23 (shenyuxue) → NO/cGMP pathway ↑42%
Cardiac Fire Purification: Cervical circumduction drains PC-8 (laogongxue) excess heat
Autonomic Balance: Pelvic swing resets vagal-sympathetic tone (J Physiol 2021)