Relaxation therapies differ in philosophy and method. In any case, the goal is to use the power of the mind and body to achieve a sense of relaxation and lowered metabolism. Relaxation therapy interventions may incorporate breathing exercises and involve relaxing the body. These interventions may involve techniques such as diversion or visualization. Relaxation therapy differs from progressive muscle relaxation in that the specific technique of sequential muscle relaxation is not necessarily used. Simple visualization may involve imagining a relaxing setting and differs from guided imagery. In guided imagery, specific types of mental images are elicited to affect specific aspects of the experience. The effectiveness of simple relaxation therapy has been examined in the treatment of anxiety, depression, fatigue, sleep-wake disturbances, and hot flashes.