A great many factors, both inherited and environmental, have influence on the development of health--related behaviors, and it is beyond the scope of this text to discuss all these factors as they may affect any given individual. The decision to adopt a particular health, related behavior is, however, usually one of personal choices. There are healthy choices and there are unhealthy choices. When Fries and Crapo were discussing the morals of personal choice, they made a comparison. They suggest that to knowingly give oneself over to a behavior that has a statistical probability of shortening life is similar to attempting suicide. Therefore, for those individuals who are interested in preserving both the quality and quantity of life, personal health choices should reflect those behaviors connecting with a statistical probability of increased vitality and longevity. "Sedentary" most probably means active. inactive. healthy. free.