Hold on four counts. Exhale on two counts. Do this in sets of ten three times a day. While staying within your comfort zone, progressively increase your seconds count to develop greater lung capacity. The author claims that there is no food or vitamin pill in the world that can deliver the health benefits that this simple exercise does.
Some people think of it as the body's sewage system.
Every cell in your body is surrounded by lymph. You have four times as much lymph fluid in your body as you do blood. The blood carries oxygen and nutrients to the capillaries, where they are diffused into this fluid around the cells called lymph. The cells, having an intelligence or affinity for what they need, take oxygen and nutrients for their health and then excrete toxins, some of which go back into the capillaries. But dead cells, blood proteins, and other toxic material must be removed by the lymph system.