1) diet. diet is the sum total of all substances taken into the digestive tract. for most americans, it is not difficult to get all the nutrients out bodies require, including protein, fat, carbohydrates, vitamins, minerals, fiber and water.
2) environment. health promoting environments include clean air, pure water, appropriate sunshine, and esthetics. it avoids environmental stressors such as including excess noise and toxic substances.
3) Activity. the category of activity includes exercise, rest and sleep. There is much confusion about the role that exercise and sleep play in health. Like diet, activity is an area where each person can take control.
4) psychology. Psychological health is characterized by high self-esteem and is dependent on two primary features productive activity and effective interpersonal skills.