The autonomic nervous system (sympathetic and parasympathetic) is called "autonomic" because it functions automatically — the person does not consciously decide to increase heart rate or dilate pupils. Yet there is one point of interface between conscious control and autonomic function: the breath. The breath is the only major autonomic function that can be voluntarily controlled. A person can choose to breathe faster or slower, deeper or shallower.
This voluntary control of the breath provides a direct pathway to the autonomic nervous system. By changing the breath, the person can change the nervous system state. Slow, deep breathing activates the parasympathetic system. Rapid, shallow breathing activates the sympathetic system. This relationship between breath and nervous system state is not mystical; it is basic physiology.
For the person whose parasympathetic system has been suppressed (who has been living in sympathetic dominance for years), breathing work provides a direct, accessible entry point for activating the parasympathetic system and teaching the nervous system that it is safe to relax.
The defended person typically breathes shallowly, using the upper chest and neck muscles rather than the diaphragm. The breath is often rapid or held. The defended person has learned to restrict breathing as a way of controlling emotion and avoiding feeling. Deep breathing is dangerous because it would activate emotion.
Breathing work in bioenergetic therapy invites the defended person to deliberately deepen the breath, to allow the breath to move fully into the belly and chest, to sustain the breath at a pace that creates a gentle challenge to the defensive system. As the person breathes more deeply, several things typically occur:
The body begins to activate: the person may experience tingling, warmth, or aliveness in the hands and face as circulation increases.
Emotion emerges: as the breath deepens, tears often flow, anger may arise, fear may surface. The restricted breath has been holding back emotion; the freed breath allows emotion to emerge.
The nervous system reorganizes: the parasympathetic system activates. The person's baseline shifts from sympathetic dominance toward a more balanced state.
The deepest and most therapeutic breathing involves the diaphragm — the primary muscle of respiration. In full diaphragmatic breathing, the diaphragm moves down on the inhalation, the belly expands, the ribcage moves slightly. On the exhalation, the diaphragm moves up, the belly releases. The breath flows easily without effort.
Many defended people have lost the capacity for full diaphragmatic breathing. The chronic muscular tension, the character armor, prevents the diaphragm from moving fully. The person becomes a chest-breather, using the accessory muscles of the neck and shoulders.
Breathing work gradually restores diaphragmatic breathing. As the person practices deeper breathing, the diaphragm slowly regains its range of motion. The chronic tension in the chest and shoulders gradually relaxes. The breath becomes fuller and the person's sense of aliveness increases.
Physiology reveals that the breath and the nervous system are locked in a bidirectional feedback loop. Emotion affects the breath (fear speeds the breath, calm slows it), and the breath affects emotion (slowing the breath calms the nervous system, speeding the breath activates it). This is not metaphorical; it is measurable physiologically.
Psychology recognizes that for the defended person, the normal breath-emotion loop has been interrupted. The person's nervous system has learned to restrict the breath to prevent emotion from emerging. The person is stuck: emotion builds but cannot be expressed because the breath is restricted, and the breath is restricted to prevent emotion.
The handshake reveals that breathing work breaks this stuck pattern. By deliberately changing the breath (deepening it, slowing it), the person can change the nervous system state, which changes the emotional state. The person discovers that they can feel emotion without being overwhelmed by it, can access feeling while remaining safe. The nervous system learns a new relationship to emotion through the breath.
Neurobiology reveals that the vagus nerve is intimately connected to breathing. The vagus nerve contains parasympathetic fibers that control the heart, the lungs, the digestive system. When the vagus nerve is activated, heart rate decreases, digestion activates, the immune system strengthens — the "rest and digest" response.
Vagus nerve physiology reveals that deep, slow breathing directly activates the vagus nerve and increases vagal tone. The longer the exhalation relative to the inhalation, the greater the vagal activation. This is why ancient breathing practices (pranayama, many meditation traditions) emphasize long exhalations: the long exhalation activates the vagus nerve and the parasympathetic system.
The handshake reveals that breathing work is a direct pathway to vagal tone and parasympathetic activation. For the cardiac patient whose parasympathetic system has been suppressed and whose vagal tone has been low, breathing work provides a daily practice that gradually increases vagal tone, strengthens parasympathetic capacity, and reduces cardiac vulnerability.
Somatic medicine recognizes that healing requires working within the nervous system's window of tolerance — the range of arousal in which the person can process experience safely. Too little activation and healing does not occur; too much activation and the nervous system is re-traumatized.
Trauma theory emphasizes that the pace of healing must be gradual, titrated to what the nervous system can handle. The person who has been in chronic sympathetic dominance cannot suddenly be asked to relax completely; the shift would be disorienting or even destabilizing. Gradual work, small steps, building capacity — this is how the nervous system learns to reorganize safely.
The handshake reveals that breathing work is an ideal titrated approach. The person can breathe slightly deeper today than yesterday. The person can extend the practice by thirty seconds. The person can experiment with longer exhalations to increase parasympathetic tone. The small, repeated shifts in breathing gradually reorganize the nervous system without overwhelming it. The window of tolerance gradually expands.
Lowen's emphasis on breathing work as a central bioenergetic practice converges with contemporary understanding of vagal tone, parasympathetic activation, and the breath-nervous system connection. Both frameworks recognize that the breath is a primary leverage point for nervous system change and that conscious work with the breath can reorganize decades of defensive patterning.
Where Lowen diverges from some contemporary breathing practices (like some meditation traditions) is in his emphasis on breathing as a vehicle for accessing and expressing suppressed emotion, not as a path to transcendence or detachment. Lowen's breathing work is designed to activate the body and the emotion, not to separate the self from the body. The goal is embodied aliveness, not disembodied awareness.
Contemporary somatic and trauma-informed approaches increasingly validate Lowen's framework. Breathing work has become a core component of trauma treatment precisely because it safely activates the parasympathetic system while allowing the person to remain engaged with their experience. The person is not trying to escape the body or the emotion; the person is learning to process it with a nervous system that has the capacity to remain regulated while doing so.
Your breath has been restricted to prevent feeling. Deepening your breath means allowing feeling. It means discovering what emotion you have been holding back through shallow breathing. It means discovering that the emotion does not destroy you, does not overwhelm you, does not cause catastrophe. It means discovering that you can feel fully and remain safe.
Each conscious breath is an act of freedom. Each time you breathe deeper, you are telling your nervous system something new: it is safe to feel, it is safe to be alive, it is safe to open.
Right now, how are you breathing? Is your breath shallow or deep? Is it in your chest or your belly?
If you allowed your breath to deepen, what sensation or emotion would emerge?
What would change in your body and your nervous system if you practiced deep breathing every day?