In either case, the physiological and psychological response to stress prepares the body to react to the danger.

In the 1920s, American physiologist Walter Cannon was the first to describe the fight-or-flight response.

Fight-or-flight response hormones include adrenocorticotropic hormone and corticotropin-releasing hormone.

fight or flight response illustration

Verywell / Joshua Seong

These hormones cause the sympathetic nervous system to stimulate the pituitary gland andadrenal glands.

This triggers the release of catecholamines, including adrenaline, noradrenaline, andcortisol.

Impact of the Fight-or-Flight Response

There are both benefits and drawbacks to the fight-or-flight response.

When we are under threat, the response prepares the body to either fight or flee.

By priming your body for action, you are better prepared to perform under pressure.

And in cases where the threat is life-threatening, the fight-or-flight response plays a critical role in your survival.

Sometimes we respond in this way even when there is no real threat.

Chronic stress can increase your risk of:

Is Anxiety a Fight-or-Flight Response?

Their body might go on high alert, with their heartbeat and respiration rate increasing.

If the response is severe, it can lead to apanic attack.

Health psychologists are interested in helping people find ways to combat stress and live healthier, more productive lives.

2016;42(2):190-206. doi:10.5465/amr.2014.0368

American Psychological Association.Stress effects on the body.

Brehm B.Psychology of Health and Fitness.

Teatero ML, Penney AM.

In Milosevic, McCabe RE, (Eds.

),Phobias: The Psychology of Irrational Fear.