The "fight or flight" response is well known—the body's rapid mobilization in the face of threat. Less widely appreciated is that the body has an equal and opposite capacity: a built-in physiological state of deep calm that can be deliberately summoned. It was given a name decades ago by researchers who studied it scientifically: the relaxation response.

The Counterweight to Stress

The stress response prepares the body for action: heart rate climbs, breathing quickens, muscles tense, and stress hormones surge. It is driven by the sympathetic branch of the nervous system.

The relaxation response is its physiological mirror. When it is engaged, the parasympathetic branch takes the lead, and a coordinated set of changes unfolds:

Heart rate and breathing slow.
Blood pressure tends to ease.
Muscle tension releases.
The metabolic "idle" of the body settles.

The crucial discovery was that this state is not merely the absence of stress. It is an active, organized physiological response in its own right—and, importantly, one that can be triggered on purpose.

A Trainable Switch

The most significant insight from the science of the relaxation response is that it is trainable and reliable. It is not a matter of waiting to feel calm. It can be deliberately elicited through specific practices.

Across cultures and traditions, the practices that reliably evoke it share a similar shape, and the early research distilled this into two core ingredients:

A mental focus: a repeated anchor for attention—a word, a phrase, a sound, the breath, or a simple movement—that gives the mind something steady to rest on.
A passive attitude: a willingness to let distracting thoughts come and go without frustration, gently returning to the anchor each time the mind wanders.

This is the common engine beneath many meditative and contemplative practices. The specific tradition matters less than the structure.

Why the Passive Attitude Matters

People often struggle with relaxation because they try too hard. They strain to clear the mind and become frustrated when thoughts intrude—which is itself a form of stress.

The science is clear that the passive attitude is essential. The mind will wander; that is not failure. The practice is simply the act of noticing and returning, without judgment, again and again. The relaxation response emerges from this gentle, repeated returning, not from forceful concentration.

The Value of Regular Practice

A single session of eliciting the relaxation response produces a temporary state of calm. The deeper benefit comes from regular practice. Practiced consistently, the ability to access this state strengthens, and the body's overall relationship with stress can shift.

It functions, in effect, as counter-conditioning to a life that frequently activates the stress response. By regularly and deliberately visiting the opposite state, a person builds familiarity with calm and a more accessible route back to it.

A Capacity Already Within

The relaxation response is an empowering idea because it locates the remedy for stress inside the body itself. The calm is not something that must be acquired from outside; it is a physiological capacity everyone already possesses, waiting to be elicited. Learning the simple structure that evokes it—a focus and a passive attitude—is one of the most durable skills in mindfulness, and a cornerstone of mental health and lasting wellness.