A hundred years ago, people had very little to worry about with this principle. The demands of living provided them with more than enough physical exercise. People today are in a much different situation. Modern conveniences will do everything from changing the TV channel to opening the garage door. Doctors tell us that we should exercise a minimum of 20 minutes a day three times a week.
Humans can go longer without food than they can without water.
Our bodies are composed of 65 to 70 percent water. Each day we loose approximately four pints. In order to replenish this, we need to drink six to eight glasses a day. Water is vital to the health of the body. It assists nature in resisting disease.