Can a Hot Tub Help My Wellbeing?
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There is a particular kind of tiredness that doesn't respond to sleep. A weariness that lives beneath the surface — in the muscles, in the nervous system, in the quiet ache of a body that has been held tense for too long. Caregivers know it. Grievers know it. Anyone who has spent months carrying more than they were designed to carry alone knows it intimately.
And sometimes, what that tiredness needs is not more rest. It needs water.
Warm, surrounding, buoyant water. The kind that holds you up when you are tired of holding yourself together.
At Luna Sol Wellbeing, we believe in the power of simple things done consistently and intentionally. And few things are as deceptively simple — or as scientifically compelling — as regular immersion in a hot tub. Not as luxury. Not as indulgence. As medicine. As practice. As a ritual of return.
Let us show you what the research is beginning to confirm about something human beings have known in their bodies for thousands of years.
Water Has Always Been a Place of Healing
Before we talk about cardiovascular responses and cortisol levels, let us acknowledge what every culture in the history of the world has already understood: water heals.
The ancient Romans built elaborate bathhouses — the thermae — as centers of civic life, where soaking in warm water was understood to be as necessary as food or rest. The Japanese perfected the art of onsen — hot spring bathing — as a practice intertwined with physical recovery, mental stillness, and social renewal. In Scandinavia, bathing culture has been woven into daily life for centuries as a cornerstone of wellbeing. Indigenous healing traditions across nearly every continent have incorporated warm water immersion as a sacred, restorative practice.
What united all of them — long before they had words like hydrotherapy or vasodilation — was the direct experience of what warm water does to a human body under stress. It releases it.
Science is now catching up, and what it is finding is remarkable.
What the Science Actually Shows
A landmark 2025 study published in the American Journal of Physiology compared the physiological effects of hot tubs, traditional saunas, and infrared saunas head to head — and the results were striking. The study found that hot tubs elicit the greatest thermoregulatory, cardiovascular, and immune responses of all three modalities, producing the greatest increase in core body temperature, the greatest increase in cardiac output, and the greatest reduction in blood pressure compared to both traditional and infrared saunas.
This is not to diminish what saunas offer — we celebrate those benefits in our companion article. But it is worth sitting with what this research is saying plainly: when it comes to certain healing responses, the combination of warm water immersion and full-body contact produces something that dry heat alone cannot replicate. The body responds to being held by warm water differently than it responds to being surrounded by warm air. And that difference matters.
Here is why.
The Body in Water: A Different Kind of Healing
When you lower yourself into a hot tub, several things happen simultaneously that do not happen in any other wellness modality.
The water supports your body. Buoyancy reduces the effective weight on your joints, muscles, and spine by up to 90%. This is not a small thing. For anyone carrying physical pain — the kind that comes from years of lifting, bending, holding, or simply from the way grief settles into the joints — this relief begins the moment you enter the water. Heat and buoyancy work together to decrease muscle tension, increase flexibility, and relieve joint stiffness, making hydrotherapy especially effective for arthritis, fibromyalgia, and post-operative recovery.
The water surrounds your nervous system. Unlike a heating pad, a blanket, or even a sauna, warm water makes contact with the entire surface of the body simultaneously. This full-body thermal envelope sends a signal to the nervous system that is difficult to replicate any other way: you are surrounded by warmth. You are safe. You can release. The parasympathetic nervous system — the branch responsible for rest, digestion, and repair — responds to this signal by activating. The chronic fight-or-flight state that caregiving and grief so reliably produce begins, finally, to recede.
The jets do work that hands cannot. The massage action of hydrotherapy jets targets specific muscle groups with sustained, adjustable pressure — relieving tension in ways that passive heat alone cannot. For people who carry stress in the neck, shoulders, lower back, or hips — which is to say, for most caregivers — this targeted release is meaningful and cumulative.
The Neurochemistry of the Soak
The emotional benefits of hot tub use are not merely subjective, and they are not simply the result of "taking a break." They are grounded in measurable neurochemical shifts that happen inside the body during and after immersion.
Warm water immersion releases endorphins — the body's natural feel-good chemicals — and research has shown that regular hot tub use leads to consistently elevated endorphin levels, creating a sustained mood enhancement that can make a real difference in daily life. These are the same endorphins released during exercise and laughter — the body's own pharmacy, accessed through warmth and buoyancy rather than effort.
Hot tubs effectively reduce stress and anxiety by lowering cortisol levels and simultaneously increasing serotonin and dopamine — the neurotransmitters associated with happiness and wellbeing. This dual effect of decreasing stress hormones while boosting mood chemicals creates a powerful formula for reducing anxiety.
Oxytocin — sometimes called the "cuddle hormone" or the "love hormone" — is also stimulated by warm water immersion. It plays a role in social bonding and has well-documented anti-anxiety and stress-relieving effects. For grievers who feel cut off from connection, or for caregivers whose relationships have narrowed to the single tunnel of caregiving, this quiet hormonal shift toward bonding and trust can be profoundly restorative.
Sleep: The Gift That Follows
Of all the benefits associated with regular hot tub use, sleep may be the one that transforms everything else.
Elevated body temperature during soaking, followed by the natural cooling that happens after you leave the water, triggers melatonin release and promotes sleep — improving scores on standardized sleep quality measures. This mechanism — warming the body, then allowing it to cool — mimics the natural temperature drop that signals to the brain that sleep is approaching. It is, in essence, a reliable way to guide the body toward the rest it so desperately needs.
For caregivers and grievers, for whom disrupted sleep is almost universal, this is not a peripheral benefit. It is foundational. When sleep improves, everything that depends on sleep improves with it — emotional regulation, immune function, pain tolerance, cognitive clarity, and the capacity to feel, even briefly, like oneself again.
A simple 20-minute soak 90 minutes before bed may be one of the most effective, accessible sleep interventions available. Not a supplement. Not a screen-time rule. Just warm water, buoyancy, and the body's own wisdom about how to descend into rest.
The Heart, the Blood, and the Long View
The cardiovascular benefits of regular hot tub use deserve their own moment of attention — because they speak to something deeper than relaxation. They speak to longevity. To the body's capacity to sustain a long life of meaningful work and connection.
A growing body of research shows that passive heating through hot tub immersion can reduce the risk of cardiovascular disease. One study of over 30,000 people in Japan who took regular hot baths over 19 years found a meaningfully lower risk of cardiovascular disease among consistent bathers. A 2022 study involving nearly 1,300 people found that routine hot tub bathing may help improve blood sugar management and lower diastolic blood pressure.
These are not small findings. They suggest that the ritual of regular warm water immersion — practiced consistently, over time — contributes to the kind of physiological resilience that sustains a person through the long demands of caregiving and the long journey through grief.
You are not just soaking for today. You are building a body that can carry you forward.
The Social Dimension: Healing That Connects
Here is something that distinguishes the hot tub from every other therapy in the Luna Sol collection: it was designed to be shared.
Saunas can be shared. Cold plunges can be done together. But the hot tub, with its bench seating, its eye-level warm water, its jets that ask nothing of you, creates a particular quality of shared space. Conversation happens differently in water. The body is relaxed. The defenses are lower. Eye contact is natural. The usual social performance that we maintain in upright, clothed, busy life — the performance of having it together — softens.
This matters enormously for caregivers, who often suffer in isolation. And it matters for grievers, for whom social connectedness has been shown to act as a protective buffer against depression, providing increased psychological resources to manage the burden of loss.
The hot tub does not force connection. But it creates the conditions in which connection becomes easier. A family member who has been at a loss for how to simply be with a grieving parent suddenly has a place to be — side by side in warm water, under open sky or quiet evening light, without the pressure of needing to say the right thing. The water holds the silence so the people don't have to.
Psychologists have described hot tubs as a "mindfulness anchor" — a dedicated space and time where people are naturally invited to slow down, disconnect from digital distractions, and be present to what is actually here. For someone whose grief or caregiving has scattered them across past regrets and future fears, that anchoring to the present moment is itself a form of healing.
The Luna Sol Perspective: Water as the Meeting of Sol and Luna
At Luna Sol Wellbeing, we see the hot tub as a uniquely balanced expression of both our Sol and Luna principles — and it is one of the reasons we are drawn to it so deeply.
The warmth of the water is Sol: active, circulatory, expansive, opening the body the way the sun opens a closed flower. It lifts the mood, stirs the blood, coaxes the nervous system out of its frozen vigilance. This is fire doing its gentlest, most sustaining work.
The buoyancy is Luna: receptive, still, surrounding, holding. The water does not demand. It does not push. It simply receives you — exactly as you are, exactly as much as you weigh — and lifts a portion of that weight away. This is the most literal expression of being held that most people will ever experience outside of another human being's arms.
For someone in grief, being held — even by water — can be quietly extraordinary. For a caregiver who has been the one doing all the holding, having something hold them in return is a form of relief that goes beyond the physical.
The hot tub is where Sol and Luna meet in water.
What a Hot Tub Practice Actually Looks Like
The word "practice" is intentional. The benefits of hot tub use — like those of every therapy in the Luna Sol collection — compound with repetition. A single soak is meaningful and welcome. A regular practice is transformative.
Here are some gentle anchors for beginning:
Start with intention, not duration. Even 15 to 20 minutes of genuine immersion — phones inside, eyes not fixed on a screen, body fully in the water — produces meaningful physiological and emotional effects. Begin there. Let the duration grow naturally.
Evening use amplifies sleep benefits. A soak 60 to 90 minutes before bed harnesses the body's natural temperature-drop mechanism to guide you toward deeper sleep. This timing is especially worth experimenting with if sleep has been the casualty of your grief or caregiving.
Let the jets do their work. Most hot tubs allow you to position yourself to direct jet pressure toward specific areas of tension. The neck and shoulders, lower back, and hip flexors — the classic repositories of caregiver tension — respond well to sustained jet therapy. Give each area several minutes rather than moving through them quickly.
Invite someone in. Where possible, share the space. Not every soak needs company, and the solo soak has its own profound value. But if there is someone in your life who is also carrying something heavy — a co-caregiver, a fellow griever, a friend who doesn't know how to help — the hot tub may be the place where help becomes possible without anyone needing to name it.
Hydrate before and after. Warm water immersion promotes sweating even when you don't notice it. Replenishing with water before and after your soak maintains the physical benefits and prevents the headache or grogginess that dehydration can bring.
Be consistent through the weeks you least want to be. The weeks when everything feels too heavy to bother with self-care are precisely the weeks when self-care matters most. A hot tub that you return to even when you don't feel like it becomes an anchor — a reliable, warm, waiting place — in seasons when very little else feels reliable or warm.
An Honest Word on What a Hot Tub Cannot Do
As always, Luna Sol tells the truth.
A hot tub will not grieve for you. It will not resolve the complexity of loss or relieve you of the impossible weight of loving someone who is no longer here, or someone who needs more from you than any one person can sustainably give. It will not replace therapy, grief counseling, medical care, or the human connection that loss and exhaustion make so necessary.
There are also people for whom hot tub use warrants medical consultation first. Those with cardiovascular conditions, uncontrolled high blood pressure, certain skin conditions, or those who are pregnant should check with their healthcare provider before beginning. Because hot water can intensify the effects of certain medications — particularly those affecting blood pressure or blood sugar — please mention it to your doctor if either applies.
The water is powerful. Respect what it asks of you: slow down, stay hydrated, listen to your body, and let yourself be held.
A Final Word
There is a reason that cultures across every era and every geography have turned to warm water as a place of healing. It is not coincidence or superstition. It is the body's own intelligence — the deep knowing that warmth surrounding the whole self, warmth that lifts rather than demands, warmth that invites presence rather than productivity, is one of the most fundamental forms of restoration available to a human being.
For a caregiver who has poured themselves out until the vessel feels empty — the water refills.
For a griever who has been holding the full weight of loss alone — the water lifts.
For anyone who has forgotten what it feels like to simply be held — without agenda, without performance, without having to be strong — the water remembers.
Come in. Let it hold you for a while.
You have earned this.
Luna Sol Wellbeing LLC offers a curated collection of premium hot tubs, infrared saunas, cold plunge systems, PEMF devices, hyperbaric chambers, infrared devices, and wellness tools designed specifically for caregivers and those walking through grief. Our philosophy is rooted in the balance of warmth and stillness — Sol and Luna — because we believe healing honors both.