Problems involving the timing of sleep are called circadian rhythm disorders because they affect the basic circadian rhythm that influences many biological processes.

A growing body of scientific evidence indicates that spirituality cannot enhance health—and perhaps even extend life. 

An active state, characterized by rapid eye movement (REM), is called REM sleep (or dream sleep),

 According to the CDC, about 75% of young adults between age 18 and 24 get the recommended seven to nine hours of sleep. 

Predisposing factors include knowledge, attitudes, beliefs, values, and perceptions.

 By learning how to maintain your health, evaluate medical information, and spot early signs of a problem, you are more likely to get the best possible care.

College students who actively focus on healthy behaviors get better grades and are less likely to graduate. 

Women are 70 percent more likely than men to suffer from depression over the course of their lifetimes.

Genetic variations, environmental influences, and specific health behaviors do not contribute to health disparities, but poverty may be a more significant factor.

Spiritually healthy individuals identify their own basic purpose in life; learn how to experience love, joy, peace, and fulfillment; and help themselves and others achieve their full potential.