How science, rest, and faith can help us care for the body God has entrusted to us.
We often talk about being stressed, overwhelmed, or unable to settle down as though those experiences are purely emotional. But stress is also physical. Our bodies are constantly receiving information, interpreting what is happening around us, and adjusting our heart rate, breathing, muscle tension, digestion, attention, and energy in response. This is part of the work of the nervous system, and it is not evidence that something has gone wrong. It is part of the way the human body is designed to protect us, help us respond to challenges, and then return to a state of rest.
One important part of this system is the autonomic nervous system, which helps regulate many of the things we do not consciously control, including heart rate, blood pressure, breathing patterns, and digestion. Two major branches of the autonomic nervous system are the sympathetic and parasympathetic systems. The sympathetic nervous system helps mobilize the body when action is needed. During a perceived threat or significant challenge, heart rate and breathing can increase, muscles prepare for action, and energy is redirected toward immediate demands. This is what we often refer to as the fight-or-flight response.
The parasympathetic nervous system supports recovery and restoration. As a stressor passes, the body can begin moving toward slower breathing, a lower heart rate, improved digestion, energy conservation, and rest. Neither system is bad. We need activation when we are exercising, solving a difficult problem, caring for someone in an emergency, or responding to a real threat. The goal is not to remain calm all the time. A healthy nervous system needs the ability to mobilize when necessary and then recover when the demand has passed.
The problem is often not stress itself, but prolonged activation without enough recovery. Short-term stress can be useful and protective, but chronic stress can affect sleep, digestion, cardiovascular function, mood, energy, and other areas of health. This gives us a different way to think about self-care. Caring for the nervous system is not simply about pursuing comfort. It is about creating healthy rhythms between effort and recovery.
There is something deeply human about that rhythm. We work, and then we rest. We exert ourselves, and then we recover. We care for others, and we also allow ourselves to receive care. Even in Scripture, we see these rhythms reflected in the life of Jesus. He withdrew from crowds, went away to quiet places, prayed, walked, slept, ate with others, and accepted hospitality. Rest is not the opposite of faithful living. Properly understood, it helps make faithful living sustainable.
Although much of the autonomic nervous system operates outside our conscious control, we can still influence it. Breathing is one good example because it happens automatically, but we can also intentionally slow and deepen it. Slow, controlled breathing has been studied for its effects on stress physiology and autonomic activity. Relaxation practices can also include progressive muscle relaxation, guided imagery, gentle movement, quiet, and other approaches that help support a physiological state of rest.
This does not mean that every difficult feeling should be breathed away or that nervous-system care replaces appropriate medical or mental-health care. Sometimes the right response is action. Sometimes we need better sleep, more nourishing food, exercise, stronger boundaries, counseling, treatment, practical help, or a change in circumstances. But we can still give the body conditions that make recovery more possible.
In practical terms, nervous-system care can be very ordinary. It may look like getting enough sleep, moving the body regularly, spending time outside, eating consistently, slowing the breath, reducing unnecessary stimulation, maintaining supportive relationships, allowing periods of quiet, and intentionally alternating effort with recovery. These practices do not have to become another complicated wellness program. They can simply become part of how we care for the body we have been given.
For Catholic Christians, there is another dimension to this. Prayer is not merely an intellectual activity happening somewhere above the shoulders. We pray as embodied people. We kneel. We stand. We bow. We make the Sign of the Cross. We breathe. We sing. We walk in procession. We receive the Eucharist. We hold rosary beads in our hands. The body is already deeply involved in the spiritual life.
That does not mean prayer should be reduced to a nervous-system technique. Prayer is relationship with God, not simply a relaxation exercise. Sometimes prayer is peaceful, and sometimes it is filled with grief, repentance, confusion, struggle, or longing. Still, caring for the body can create more interior space for attention, prayer, service, and presence. A body that has been given opportunities to recover may find it easier to become still, and a person who can become still may sometimes find it easier to listen.
Scripture says, “Be still, and know that I am God” (Psalm 46:10). Christian stillness is much more than physiological quiet, but physiological quiet can sometimes help us enter it. When our bodies are not constantly bracing for the next demand, we may become more available to notice, receive, and respond.
This understanding is part of the foundation behind Supported Deep Relaxation™. SDR is a gentle, non-clinical relaxation practice intended to create supportive conditions for deep physical rest. It is not designed to diagnose or treat disease, and it does not replace medical or mental-health care. Instead, it offers a period of intentional support and rest for people who may be carrying the effects of ongoing stress and activity.
Learn more here: Supported Deep Relaxation
For Christians, caring for the nervous system does not have to become an inward-looking pursuit of perpetual calm. Rest has a purpose. We rest so that we can return to the work in front of us. We recover so that we can serve more faithfully. We become quiet so that we can hear more clearly. We receive care so that we have something to give.
Our bodies are not obstacles to the spiritual life. They are part of the life God has entrusted to us. Caring for them wisely can become one expression of stewardship, helping us remain more available to love God and neighbor with attention, endurance, generosity, and presence.
Medical and Scientific References
Guidi, J., Lucente, M., Sonino, N., & Fava, G. A. (2021). Allostatic load and its impact on health: A systematic review. Psychotherapy and Psychosomatics, 90(1), 11–27. doi:10.1159/000510696
Kidd, T., Devine, S. L., & Walker, S. C. (2023). Affective touch and regulation of stress responses. Health Psychology Review, 17(1), 60–77. doi:10.1080/17437199.2022.2143854
Laborde, S., Allen, M. S., Borges, U., et al. (2022). Effects of voluntary slow breathing on heart rate and heart rate variability: A systematic review and a meta-analysis. Neuroscience & Biobehavioral Reviews, 138, 104711. doi:10.1016/j.neubiorev.2022.104711
Lamotte, G., Shouman, K., & Benarroch, E. E. (2021). Stress and central autonomic network. Autonomic Neuroscience, 235, 102870. doi:10.1016/j.autneu.2021.102870
