There is a great deal of conversation at the moment about nervous-system regulation, stress reduction and the importance of creating conditions in which the body feels safe enough to recover. For me, BioHarmony and resilience sit inside that same conversation, but they point to something broader than calm alone: the capacity to respond to changing biological and life demands, recover when recovery is possible, retain agency and remain connected to what still gives life meaning. Much of the current interest in regulation represents a welcome correction to an older health and performance culture that often rewarded relentless output, inadequate recovery and the idea that discipline could solve almost anything. We now understand far more about the ways prolonged psychological and physiological load can interact with sleep, mood, cardiovascular health, metabolism, immune function, pain and the way we experience effort.
What concerns me is the point at which calm itself becomes the objective. Human physiology is not designed to remain in one state: heart rate rises and falls according to demand, cortisol follows a daily rhythm and changes in response to challenge, the immune system activates and resolves, and muscle adapts because it is exposed to appropriate load and then given sufficient opportunity to repair. Even healthy emotional life involves movement between activation and recovery rather than uninterrupted ease.
BioHarmony is not a promise of permanent equilibrium, and resilience is not the ability to tolerate an unlimited amount of pressure. Both are better understood through adaptability: our capacity to move between states, respond appropriately to challenge and recover sufficiently afterwards.
The question becomes less about how calm we can make ourselves and more about how well the whole system can move between states without becoming trapped in one of them. That is a more realistic model of health, and increasingly, I think, a more useful one.
BioHarmony and resilience begin with adaptability
The word stress is so broad that it can easily obscure more than it explains. A demanding training session, an infection, a difficult conversation, a night of broken sleep, financial insecurity, grief and a frightening medical diagnosis can all be described as stressors, yet they are not biologically or psychologically equivalent. The way a person responds depends not only on intensity, but also on duration, predictability, previous experience, perceived control, meaning, available resources and whether there is sufficient opportunity to recover afterwards.
A short-lived challenge that is chosen and followed by adequate recovery can increase capacity. Exercise is the most familiar example: we deliberately disturb physiological equilibrium because an appropriate dose of load, followed by repair, stimulates adaptation. The picture changes when demand is prolonged, uncertain, repetitive or repeatedly exceeds the resources available to meet it.
This is where the concept of allostasis is particularly useful. Rather than thinking about the body as trying to maintain one perfectly stable internal state, allostasis describes the active adjustments that allow us to respond to changing conditions. Those adjustments are necessary for survival; the difficulty begins when adaptive systems are repeatedly activated without sufficient resolution, or when maintaining that response becomes increasingly costly over time.
The distinction matters because the stress response itself is not inherently pathological. Acute activation can be protective, energising and appropriate. What becomes problematic is often the combination of duration, intensity, insufficient recovery and the wider biological context in which a stressor arrives.
A person who is sleeping well, eating adequately, medically stable and recovering appropriately between sessions may become stronger through a challenging exercise programme. The same training prescription may be poorly tolerated by somebody recovering from infection, sleeping four hours a night, navigating hormonal change and caring for an unwell parent. The intervention cannot be separated from the state of the person receiving it.
This is why advice simply to “reduce stress” or “regulate your nervous system” rarely takes us far enough. The more useful questions are specific: what kind of load is present, how long has it been there, how recoverable is it, and what else is happening biologically at the same time? Is there illness that needs investigating, a medication effect, a hormonal change, a sleep problem, an unsustainable environment or a psychological pattern that is amplifying the experience? The nervous system belongs inside that picture, but it should not be asked to explain the whole picture.
When distress is information rather than dysfunction
One of the more useful ideas I have been reflecting on recently comes from work exploring chronic stress, climate anxiety and collective resilience. The principle is simple but clinically important: if somebody is distressed by something that is genuinely threatening, painful or uncertain, the objective cannot automatically be to remove the distress.
Anxiety can of course become disproportionate, persistent or disabling, and it may require appropriate psychological or medical treatment. Previous trauma can shape the way current threat is perceived, while panic, hyperarousal and persistent anticipatory anxiety are all real clinical phenomena. But there are also times when a difficult emotional response is proportionate to the situation a person is actually living through.
A woman caring simultaneously for children and ageing parents may feel overwhelmed because the load is genuinely overwhelming. Someone whose working environment has become unsustainable may not need to become more skilful at tolerating it. A patient experiencing new palpitations needs medical assessment before the symptom is interpreted as autonomic dysregulation, while persistent fatigue may reflect poor sleep, anaemia, thyroid disease, infection, medication, hormonal transition, inflammatory illness, depression, excessive training or several interacting factors.
This is why I return repeatedly to the idea that symptoms are information. The clinical task is not to assign every symptom a psychological meaning or to suppress every unpleasant signal, but to understand its timeline, context and possible drivers while ruling out disease that requires investigation or treatment. The nervous system is foundational in many areas of health, but it is rarely the whole explanation, a distinction that sits at the centre of the BioHarmony framework.
The same principle applies emotionally. Grief is not necessarily dysregulation, anger may contain useful information about a boundary, fear may be proportionate to genuine uncertainty, and exhaustion may be telling us that the current combination of biological and life demands can no longer be sustained. Good regulation should not make us less able to hear these signals; it should give us enough flexibility to decide what they require.
Sometimes the answer is treatment, sometimes rest, sometimes a change in environment or behaviour, and sometimes support from another person. There are also occasions when the task is to tolerate a difficult reality that cannot yet be changed, without allowing that reality to occupy every part of the day. A health culture that becomes obsessed with regulation can accidentally teach people that every uncomfortable internal state is something to eliminate, when a more mature aim may be to develop enough capacity to hear an important signal without becoming entirely organised around it.
Agency matters more than perfect control
This brings me to one of the themes in Professor Elissa Epel’s work that I find particularly relevant to BioHarmony: the difference between control and agency.
Health optimisation has always had a complicated relationship with control. The attraction is understandable. The more closely we measure glucose, sleep, heart-rate variability, hormones, exercise, supplements, food and biological age, the more it can feel as though uncertainty itself is being reduced. Used well, data can be extremely helpful, revealing patterns, challenging assumptions and improving clinical decisions.
Used differently, measurement can also reinforce the belief that enough vigilance should eventually make the future predictable. Human biology does not offer us that guarantee, and neither do relationships, ageing, families, work or the wider world.
Agency is more useful because it asks a different question: given the circumstances that actually exist, what remains available to me? Sometimes the answer is immediate and practical, such as making the appointment, investigating a symptom, reducing a training load, changing a schedule, asking for help, reviewing medication or having a conversation that has been repeatedly postponed. At other times, very little about the external situation can be changed in the short term.
The stress-mapping work described in Epel’s Samahita sessions is useful precisely because it asks people to examine the actual landscape of their lives, separating what can be changed from what they are mentally carrying despite having very little immediate influence over it. It is not offered as a cure for stress, but as a way of seeing more clearly what can be reduced, delegated or acted upon and what continues to consume energy without yielding a solution.
That distinction sounds straightforward, but it is surprisingly difficult in practice because rumination often feels like problem-solving. We can revisit the same uncertainty repeatedly because disengaging from it feels irresponsible, even when no new information has appeared and no useful action is currently available. The mind remains engaged because continuing to think creates the sensation of doing something.
There are moments, however, when repeatedly trying to solve the unsolvable does not increase control. It simply prolongs the physiological and cognitive cost of trying. In those situations, acceptance can become an active form of resource management rather than resignation, allowing a person to eat, sleep, move, work, connect and recover even though the external problem remains unresolved.
Agency does not require the belief that everything can be changed. It requires enough clarity to recognise what can, what cannot, and where our resources are best spent.
The stress landscape is larger than our private lives
Another aspect of Epel’s recent work that I find increasingly relevant is the widening of what we consider to be a stressor. Traditional stress research has understandably focused heavily on personal experiences such as health, relationships, work and major life events, but many people now live inside overlapping layers of technological overload, economic uncertainty, geopolitical instability, environmental anxiety and continuous exposure to distressing information.
These are difficult forms of stress because they combine relevance with limited individual control. We may care deeply about an issue while having only a very small sphere of direct influence over it, creating a tension between feeling responsible and feeling powerless. The instinct can become either to absorb everything or to disengage completely, neither of which is particularly sustainable over time.
The collective-resilience material from Samahita is interesting because it does not suggest that the solution is to care less. Instead, it places greater emphasis on agency, community and the scale at which a person can genuinely act, moving attention away from the impossible task of privately solving every global problem and towards the people, projects and environments within reach.
This has clear relevance beyond climate or political stress. A clinician cannot solve every problem in medicine, but can practise well with the patient in front of them. A parent cannot remove all uncertainty from a child’s future, but can create a home in which uncertainty is more tolerable. A leader cannot control an entire industry, but can shape the culture of their own team.
Healthy engagement requires boundaries around attention as well as boundaries around time. The aim is not to become indifferent to the wider world, but neither is it physiologically sensible to carry every global problem as though it were a private emergency requiring an immediate personal response.
Why joy belongs inside a serious model of health
Joy is one of the words medicine is still slightly uncomfortable with. We know how to discuss blood pressure, lipids, glucose regulation, cardiovascular fitness, body composition and bone density because they are measurable and familiar within conventional clinical frameworks. Joy can sound soft or peripheral beside them, particularly in conversations about chronic disease and longevity.
I think that misses its role.
Recent work exploring deliberate micro-acts of gratitude, kindness, awe and connection is interesting not because it suggests that a few pleasant experiences can erase serious stress or disease, but because it raises the possibility that small, chosen actions can influence how much agency a person feels they retain. The Samahita field notes describe this as one of the more interesting findings from Epel’s joy work, while also being appropriately cautious about the limitations of the published study design and the need not to overstate causality.
What interests me is the principle rather than the promise. A difficult day can contain a genuinely good moment without the difficulty becoming less real. Grief can coexist with beauty, illness with appetite, and uncertainty with laughter or friendship. These moments do not prove that the underlying problem has disappeared; they simply prevent that problem from becoming the entire definition of experience.
Chronic threat tends to narrow attention towards danger, unfinished tasks and what needs solving next. In the short term, this is often adaptive because it helps us prioritise what requires immediate attention. Over time, however, that narrowing can become so complete that the person experiences the difficulty as though nothing else is present.
Joy widens the field again. It may come through music, movement, being in water, eating with somebody you love, laughter, a view, a dog, a conversation, a sense of awe or the experience of doing something kind for another person. None of these are substitutes for treatment, but they can sit alongside treatment as evidence that life remains larger than the problem currently dominating it.
This is one reason I have become increasingly interested in what I call JoySpan. Longevity is usually discussed in terms of lifespan and healthspan, both of which are useful, but a longer life spent entirely managing risk, restricting pleasure and monitoring numbers is not a particularly compelling vision of ageing. Longevity, as I practise it, is the preservation of function, adaptability, agency, connection and joy across a longer life, and those human qualities belong within the outcome rather than being treated as decorative extras added once the biomarkers are satisfactory.
BioHarmony and resilience are relational
Modern health optimisation has a tendency to imagine health as an individual project. We talk about your sleep, your glucose, your readiness score, your workout, your supplements, your morning routine and your discipline, all of which can reinforce the idea that the individual is largely responsible for regulating their own physiology irrespective of the context around them.
Human beings are less self-contained than that model suggests.
We regulate in relationship, and the presence of another person can alter the way an experience is interpreted and tolerated. Being listened to changes the texture of distress, practical support can turn an impossible demand into a manageable one, and shared movement, music, ritual or conversation can alter the experience of effort and recovery.
This is one of the most important themes in Epel’s collective-resilience work. The Samahita material repeatedly returns to the idea of building community and internal resources before exposing people to sustained external demand, rather than assuming that individuals should simply become more resilient in private and then return alone to the same environment that depleted them.
That principle travels easily into clinical life. A patient recovering from illness may have an excellent treatment plan, but it becomes much harder to follow if nobody around them understands their reduced capacity. A new mother may benefit from sleep advice but need practical support more urgently than another sleep intervention, while an exhausted executive may learn breathing techniques without those techniques ever compensating for a working culture built around impossible expectations.
The relevant question is therefore not whether self-regulation matters, because it clearly does, but whether we are asking individuals to regulate themselves inside environments that continually recreate the same physiological and emotional demand. The missing resource may be biological, relational or structural, and good clinical care has to be able to tell the difference rather than handing every problem back to the individual as another self-improvement task.
Recovery does not always mean returning to who you were
Resilience is often described as the ability to bounce back, a phrase that is intuitive and reassuring but does not always reflect what recovery actually looks like. Some experiences change us: serious illness can, bereavement can, parenthood can, hormonal transitions can, and ageing certainly does.
The system that emerges afterwards may not be identical to the one that existed before, which is why adaptation can be a more useful idea than restoration. A person who once defined fitness through endurance may discover strength or walking, someone whose identity was built around productivity may have to develop a different relationship with rest, and a patient living with a chronic condition may create a rich life around changed physiological limits rather than spending every day fighting the fact that those limits exist.
None of this means abandoning treatment or ambition. It means allowing health to remain possible even when complete restoration is not.
The BioHarmony framework is useful here because it does not assume one fixed destination. I often think about the clinical process through Safety, Stability, Capacity and Sustain, while recognising that real lives do not move neatly through those stages in a straight line. A person may have excellent cardiovascular capacity but very little emotional reserve, or they may be medically stable while living in a socially isolating environment that undermines recovery.
Safety asks what needs investigation, treatment or protection before more demand is added, while stability means establishing enough consistency in areas such as sleep, nutrition, medication, hormonal health, autonomic state and daily rhythm to see the pattern more clearly. Once sufficient stability is present, capacity can be built through exercise, metabolic conditioning, cognitive challenge, emotional tolerance and relational support.
The final question is sustainability: can the plan survive travel, family life, illness, changing hormones, difficult work periods and the inevitable week in which everything goes wrong? A health strategy that functions only under ideal conditions may be sophisticated, but it is not yet resilient; it needs enough elasticity to contract when capacity is lower and expand again when capacity returns, without forcing the person to choose between having a life and maintaining their health programme.
This is one of the places where BioHarmony differs most clearly from optimisation culture. The aim is not maximal control, but a system with enough adaptability to change its response as circumstances change.
What BioHarmony and resilience look like in real life
In practice, this means resisting the temptation to divide interventions into universally “good” and “bad” categories. For somebody with a new symptom, the right next step may be conventional medical investigation before any attempt at nervous-system regulation. For a person who is profoundly sleep-deprived, adding fasting, cold exposure and high-intensity training may simply increase the total load, while somebody who is healthy, well-rested and appropriately trained may benefit considerably from deliberate physiological challenge.
The same intervention can therefore build capacity in one context and exceed reserve in another. The question is not simply whether exercise, fasting, heat, cold, breathwork or any other intervention is beneficial in principle, but whether it is appropriate for this person, in this state, at this point in time.
That is why sequencing matters. Sometimes the first task is removing an obvious physiological overload or investigating disease, and sometimes it is creating enough stability in sleep, nutrition, medication, hormones or environment for the pattern to become interpretable. At other points, the intelligent move is to introduce more challenge because capacity only grows when it is used.
A useful health plan should therefore contain some elasticity. It needs to be able to adapt to travel, family responsibilities, illness, lower motivation, disrupted sleep and changing biological demands rather than collapsing as soon as life becomes untidy. If a protocol requires perfect conditions, two uninterrupted hours every morning and complete control over food, sleep, exercise and social life, the protocol may be impressive but it is not particularly resilient.
The plan has to support the life it is meant to preserve.
A longer life needs more than risk reduction
The longevity field has become exceptionally good at identifying variables. ApoB, blood pressure, glucose regulation, VO2 max, strength, muscle mass, bone density, sleep duration, imaging, genetics and biological-age measures can all contribute useful information when interpreted properly.
The risk is allowing what can be measured most precisely to become the whole definition of health.
A person can have excellent biomarkers while being profoundly lonely, or they can be metabolically healthy while becoming increasingly unable to tolerate any disruption to their routine. They may exercise every day while losing the ability to experience movement as anything other than a performance task, and they can extend life while progressively narrowing the life being extended.
This is why BioHarmony and resilience matter to me as a wider frame. Reducing preventable disease remains fundamental: cardiovascular health, cancer prevention, metabolic function, muscle, bone, sleep and cognitive health all deserve serious attention. But healthspan must also include the ability to participate fully in life, make choices, adapt when circumstances change, tolerate uncertainty without becoming immobilised by it, remain connected to other people and retain enough curiosity and pleasure that the future still feels worth inhabiting.
These qualities are harder to capture than blood pressure, glucose or VO2 max, but that does not make them peripheral. They are part of what determines whether the additional years we are trying to create remain useful, connected and worth living.
The world is not going to become calm enough for us to begin living, and our bodies will never become completely predictable. The people around us will change, our responsibilities will change and our own capacity will fluctuate, which means there will be periods when more challenge builds reserve and periods when additional challenge is precisely the wrong prescription.
Health has to be able to accommodate all of this.
That is what I mean by BioHarmony: not perfect equilibrium, but the continuing capacity to respond, recover and remain connected as biology and life change around us. Resilience, in this context, is not endless endurance; it is having enough flexibility to recognise what the moment requires, enough reserve to respond where we can and enough humanity to allow for periods in which the intelligent response is rest, support, acceptance or simply noticing that something good still exists alongside everything that is difficult.
A longer life needs that kind of adaptability, but so does an ordinary one.
Comments will display here