Bone Breathing and Marrow Washing
“Bone Breathing is one of the main practices of the Cosmic Healing Chi Kung practice. This is a method of drawing external Chi through the skin into the bones to help regrow and replenish the bone marrow, thusly assisting in the production of white blood cells.
“Sending Chi into the bones will therefore enhance the immune system. This process also helps to clean out fat in the bone marrow (“Washing the Marrow”), one of the main causes of osteoporosis (brittleness of the bones).”
By practicing these postures, and feeling vitality in the body, the tension in the muscles close to the bones is decreased. Energy and blood can flow into them easily, and the bones themselves become strong.
-From: Cosmic Healing II, by Mantak Chia