Stress is the body's mental, physical, emotional response to any situation that is new, frightening, threatening, or exciting and therefore disrupts the internal balance or equilibrium of the body. Managing stress is an important step towards behavioral change and improved quality of life. Stress undermines our ability to stay well and is linked to illness and increasing health care costs. It can be beneficial, providing motivation. Positive stress is known as eustress, and sometimes health increases with stress. The body responds to stress with a fight or flight response. The hypothalamus sends hormones via the adrenal glands. Excercise is crucial to controlling stress. Coping is the attempt to manage stress so that it does not define your life. To manage stress it's important to realize that perception is under your control. It can be managed with mind calming procedures, muscle calming procedures, etc (Biofeedback, Yoga, meditation, Visualization, autogenic inhibition).