Bone marrow nei kung
Component of the Healing Tao System. It is an offshoot of Iron Shirt Chi Kung and a variation of self-healing. “Nei Kung” reportedly means “practicing with your internal power.” The method supposedly involves “breathing” chi through fingertips and toes, contracting muscles to force chi into bones, hitting various parts of one’s body (e.g., with sticks), and swinging weights (up to ten pounds) suspended from one’s genitals. Also called iron shirt chi kung III, iron shirt III.