Friday 18 April 2008

Energy Medicine

One of my daughters kindly bought me a CD on relaxation. The voice on the tape told me to breathe deeply and to experience an energy shower every day. I like a shower but I could not understand what she was on about. We took the tape back. It got me thinking about energy. We hardly think about energy until we feel that we have not got any.  We expend energy by work and lose it as heat. So every day we need to replace the lost energy. Where does it come from? Ultimately it comes from the sun. Light travels in tiny units called photons. Sometimes photons act like particles, sometimes like waves. Energy also arrives as heat. Plants take up the energy and convert it by photosynthesis. Either we, or animals eat the plants, or we eat the animals. Plants store energy as either starch or as sterols. Sterols are fats. Ergosterols are plant fats (ergo means work). Cholesterol is a type of human fat. Humans also store energy as glycogen. Glycogen is found in muscles and in the liver. How much energy you feel depends on your ability to convert food, and stored energy into work and heat. People who train their bodies to use energy become very efficient at converting it.

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