The document discusses several body systems and how to keep them functioning optimally. It notes that the nervous system is always active and a good indicator of energy levels without stimulants. Minerals enhance nervous system function. The digestive system requires the most energy during digestion so meals should be spaced out with 6-4 hours between each. Respiration increases during exercise to produce energy for muscles; diaphragmatic breathing is most efficient. The circulatory system balances fluids, nutrients, oxygen, waste and immune cells; maintaining water-mineral-fat balance helps it run efficiently. Eating fiber helps the excretory system with repair, cleaning and function. Balanced sleep of 6-8 hours including 1.5-1.